|“||Your sin is... your very being!||”|
—Zai casts Oz into the Abyss
|Manga | Anime|
|Unusual Features||Facial scar|
|Affiliation||Vessalius Dukedom |
|Occupation||Heir to the Vessalius Dukedom |
Ally to the Baskerville Clan
|Base of Operations||Vessalius Estate|
|Relatives||Viscount Vessalius (Ancestor) (†) |
Jack Vessalius (Ancestor) (†)
Oscar Vessalius (Brother) (†)
Rachel Cecile (Wife) (†)
Sara Vessalius (Sister-in-Law) (†)
Unnamed Son (†)
Oscar's Unnamed Son (Nephew) (†)
Ada Vessalius (Daughter)
Oz the B-Rabbit (Adoptive Son)
|Manga Debut||Retrace II: Tempest of Conviction|
|Anime Debut||Pandora Hearts Episode 2: Tempest of Conviction|
|Japanese Voice||Tooru Ookawa|
Zai Vessalius is the heir apparent to the Vessalius Dukedom, being the elder brother to Oscar Vessalius. For reasons unknown Zai declined the opportunity to become Duke Vessalius, allowing Oscar to do so instead. However, Oscar was not qualified to form a Contract with the Vessalius Dukedom's Black Winged Chain, Gryphon, and thus Zai formed the Contract instead.
Before the birth of his first child, Zai made a deal with his ancestor, Jack Vessalius, as Jack had been rejected by the Abyss and was in a continuous cycle of rebirth. Zai soon regretted his decision as he saw Jack as the source of all his misfortune, including the deaths of his wife and child. In return, Zai became consumed with rage, bent on revenge, he formed a vendetta and aligned himself with the Baskervilles and began to dehumanize 'Oz Vessalius' in hopes of hurting the Chain who's soul resided in the body, Oz the B-Rabbit, as well as Jack himself in order to exact his revenge. Despite failing to destroy Jack through casting Oz into the Abyss, Zai still continues to attempt to destroy Jack and crush Oz's spirit, now serving under Oswald and going as far as to kill Oscar in pursuit of his goal.
Zai had married a woman named Rachel Cecile, and together they were expecting their first born child. As winter approached and Zai's first born was due for delivery in the very near future, Zai was approached by a young child with blonde hair and emerald-green eyes. This child identified himself to Zai as Jack Vessalius, claiming to have lived continuously throughout the past 100 years.Jack stated that it was nice to meet Zai, and not to be frightened, requesting that Zai listened to what he had to say. Zai did so, allowing the child before him to explain that within his body slept the soul of a Chain which had been in the process of destroying the world 100 years ago, B-Rabbit. Jack explained to Zai that his body had been rejected by the Abyss, and as a result it had been forced to rewind itself physically because Jack had come into contact with the power of The Nucleus of the Abyss. As a result of his body being rewound too many times, Jack's soul was destined to vanish completely. Jack then proposed that Zai welcome his body as 'Oz' into the Vessalius family, replacing Zai's child as it was going to be stillborn.
Zai was skeptic of what Jack had told him, but as time progressed and Rachel had gone into labor, it turned out that what Jack had predicted had come true, as Zai's child had been born in death's embrace. Furious about the situation he had been put in, Zai stole the body of his son from Rachel as she slept, storming off into the night. Zai sought out Jack, who's body had been reverted to the form of an infant at this point, and so Zai fulfilled Jack's wish, swapping out his deceased child for the young Jack. Zai had done so in part because he had seen what had happened as an opportunity to acquire information from Jack, however the main reason Zai had for switching Jack for his dead child was in order to spare Rachel the pain and suffering that she would be forced to deal with when she awoke to find that her child had died.
Zai soon realized that he had made a mistake, as Jack's induction into the current Vessalius household was followed by disaster. Although Rachel and Zai had managed to produce a second child successfully, whom they named Ada Vessalius, Rachel died in a freak carriage accident soon after. Zai has always suspected that this accident was somehow instigated by Jack. The death of his wife had hit Zai hard, and although the public rumors stated that the Nightrays were responsible for Rachel's death, Zai knew to blame Jack instead, realizing that he had been played as a fool by Jack. Another death in the family had followed not long after, with Duchess Vessalius dying during child birth, alongside her's and Oscar's child. Zai blamed Jack for the deaths of Duchess Vessalius and her child as well, and so Zai commenced with a process of dehumanization of 'Oz Vessalius', treating him poorly in order to hurt both Oz the B-Rabbit and Jack himself, all in the pursuit of revenge.
Zai, being the first born child between himself and Oscar, was meant to take on the role of the head of the Vessalius family. However, Zai turned down such an opportunity, allowing Oscar to become Duke Vessalius instead. Although Oscar successfully hid the Vessalius Key to the Abyss (as one of his Ducal duties), Oscar lacked the correct qualities to form a Contract with any Chain, and so Zai had to form a Legal Contract with the Black Winged Chain who acted as guardian to the Vessalius Door to the Abyss, Gryphon, thus allowing the Vessaliuses to have access to the Abyss.
When Oz was about ten years old (physically), Oz had been suffering emotionally because he thought that Zai hated him. Oz's personal valet, Gilbert insisted that such a thing could not be true, and so Gilbert grabbed a bouquet of flowers and ran to Zai in order to prove Oz that he was wrong. Oz chased after Gilbert, but reached him as Gilbert presented Zai with the bouquet, saying that they had been from Oz and requesting that Zai visited Oz in his room in order to make Oz feel more secure about his relationship with Zai. Zai told Gilbert that he spoke out of turn, but Gilbert asked why it had to be that way, asking if Oz was not Zai's 'beloved precious son'. Zai smiled when he heard this, and so he clutched the bouquet and threw it to the ground, saying that a child like Oz should never have been born.
Gilbert became frantic, clutching to Zai's coat and asking what he meant and attempting to explain all that Oz had done in order to meet the approval of Zai. Zai stopped Gilbert mid-sentence, smacking him to the ground and asking who Gilbert thought he was, as well as if Gilbert had the intention to disobey his master. Gilbert angrily objected and insisted that Zai was not his master, Oz was.
Zai had heard enough and ordered his valets to take Gilbert away and lock him in the mansion's basement. Oz ran to Zai, begging him not to fire Gil and reaching out in order to grab Zai. However, before he could, Zai smacked Oz's hand away, telling Oz not to touch him and calling him a vile creature.
At an unknown point, Zai aligned himself with the Baskervilles in Sablier alongside Duke Bernard Nightray, often visiting Sablier in order to meet with them. Together, the Baskervilles planned on watching Oz as his Coming of Age Ceremony approached with his fifteenth birthday, in order to ensure that Oz was the child mentioned in the prophecy of the Baskervilles.
Coming of Age Ceremony ArcEdit
When the time came for Zai's supposed son, Oz, to undergo his Coming of Age Ceremony, Zai, three other Baskervilles, Zwei and two unknown Baskervilles, prepared their plan to cast him into the Abyss. During the ceremony, the Baskervilles observed from outside to see if Oz truly was the boy mentioned in the prophecy. When Oz touched the clock that had been silent for 100 years, it's hands moved forward, thus proving that Oz was indeed the child mentioned in the prophecy. Time froze and the Baskervilles sprung into action, breaking into the mansion to confront Oz. Gilbert, under the control of Zwei, restrained Oz and stabbed him in the chest with a dagger, as a blood offering. Zai then used the power of his Chain, Gryphon, to create a seal on the floor that opened a path to the Abyss.
However the Chain, B-Rabbit, used the opening as a chance to momentarily escape the Abyss. B-Rabbit appeared as a giant black rabbit to the Baskervilles, and a little girl to Oz. B-Rabbit saved Oz from Gilbert and claimed him as her "property". B-Rabbit then attacked and defeated the Baskervilles though she spared them as their objectives were similar. Gilbert regained consciousness and demanded to know why the Baskervilles wanted to cast Oz into the Abyss. A flash of lightning from the storm outside briefly revealed Zai's face to Gilbert, shocking him. Oz picked up a nearby sword and charged at Zai, telling him to stay away from Gilbert. At the last moment, Gilbert took the blow for Zai, not wanting Oz to hurt his own father. B-Rabbit appeared behind Zai and stated that she enjoyed the chaos, but he quickly turned around and slashed through her with his sword, banishing her back to the Abyss. With both Gilbert and B-Rabbit out of the way, the Baskervilles held Oz still so Zai could pass judgement on him with Gryphon. Zai then banished Oz into the Abyss for "the sin of his existence".
Having been released from the Abyss 10 years later, Oz joined Pandora with his illegally contracted Chain, Alice the B-Rabbit. The two of them, joined by Oz's old friend and servant Gilbert, went into Reveille to do a mission for Break. There Gilbert explained Oz's past to Alice.
Zai hadn't been around much when Oz was younger, but one day he returned to the mansion, Oz asked Gil why his father hated him to which he suggested they go and ask Zai. Oz said couldn't because he was too afraid of the truth. Gilbert then decided he'd do it on his own, and her grabbed a bouquet of flowers to deliver to Zai. Oz chased after Gilbert and found Gilbert begging Zai to take the flowers and go visit Oz. Zai was unhappy that Gilbert had spoken out of turn, causing Gilbert to ask him why he continuously denied Oz when he was his 'beloved precious son'. This made Zai laugh and he took the flowers from Gilbert's hand. He then crushed them, letting them fall to the ground whilst saying that a child like Oz should never have been born. Gilbert grabbed Zai's coat and asked him why he'd say something like that. In return Zai slapped Gilbert, sending him to the ground. Zai asked who Gilbert thought he was, going against his master. It was then that Gilbert shouted that Oz was his master. Zai ordered his valets to take Gilbert away but Oz ran to his father and begged him not to fire Gil . However when Oz tried to reach out to him, Zai slapped his hand away, called him "filthy", and simply walked away. Oz was locked in his room after this encounter, and Gilbert was locked in the basement of the Vessalius mansion for three days until Oscar rescued him.
Sablier ArcEditAfter Elliot, Leo, Oz and Gil had all met up in The Hole, Zai appeared to retrieve Elliot, as Bernard couldn't do it himself. Elliot declined, saying that he would never accept help from a Vessalius and that Zai should be offering to help his son. Zai simply smirked and said that he didn't care what happened to "that thing". Elliot, enraged, began yelling at him, only to be stopped by Leo, who apologized to Zai. Zai remarks on how smart a servant Elliot had before leaving.
Gil ran after Zai and held him at gunpoint, because of how he'd hurt Oz. Zai expected this and recalled how Gilbert had held him at gunpoint before shortly after joining Pandora, threatening to kill Zai if he ever came anywhere near Oz again. Gilbert then went over the events that happened after Oz was cast into the Abyss. Gilbert was the only one who remembered what had happened. He told Oscar that Oz had been cast into the Abyss and that it was his own father who'd done it, but when Oscar looked into the matter, Bernard Nightray provided an alibi for Zai, saying that he was with him at the time of the Coming of Age Ceremony. Oscar accepted this but he didn't realize that Bernard was also secretly involved with the Baskervilles. Zai summoned Gryphon and confirmed again to Gilbert that it was he who cast Oz into the Abyss 10 years ago. Gil attempts to shoot Zai, and Gryphon prepares to defend it's contractor but Mad Hatter appeared between the two and stopped them from fighting. Break then appeared behind Gil and pulled him away while Zai proceeds out of the Inner Hole. Gil later admits that he wouldn't have been able to kill Zai because it would've hurt Oz too much.Zai later found Lottie and Zwei, who was unconscious and severely injured. Zai carried Zwei as he and Lottie traveled to the Baskervilles' Door to the Abyss, though Zai dropped Zwei on floor as soon as they reached the door. Zai and Lottie had arrived just in time to greet Lily as she's released from the Abyss. Lottie then explained to her how the Baskervilles' main purpose now was to search for and destroy the Sealing Stones which prevented Glen from returning.
Re-Emergence of the Head Hunter ArcEdit
During a conversation with Sheryl Rainsworth, Break revealed that he'd talked to Oscar Vessalius recently, and was told how after Oz was born, Zai stole him away from his sleeping wife and ran off in the rain without saying where he was going or for what reason. When he came back, Zai said that he merely wanted to celebrate the christening of his child alone. Break told Sheryl that it was possible that Zai had switched the child with another, and that the current Oz might not have been the real Oz Vessalius.
In one of Vincent's flashbacks, Ada Vessalius took him to a townhouse in Reveille and explained how Oscar had set this up for her as a secondary residence. She explained that she wasn't allowed to bring friends to the main house by order of her father.
Jack's Intention ArcEditZai and several Baskervilles arrive outside of the Vessalius mansion just as Oscar tries to head to Pandora. Zai questions where Oscar thought he was going, having the Baskervilles surround Oscar and Ada so that they could all have a nice long family talk. Oscar blocks Ada from Zai and glares at his brother as he stands before him.
Zai has the Baskervilles take Oscar and Ada inside of the Vessalius mansion, where Zai proceeded to explain to the two of them how Oz was a Chain and not actually Zai's son. Oscar and Ada initially had difficulty grasping such a thing as a possibility, but Zai explained his intentions to them and how Jack had approached him before his son was born, correctly predicting his son being stillborn. Zai explains that to ease Rachel's pain, he agreed to allow Jack's infant body (having aged in reverse from the body of about a nine year old since their last conversation) to replace his own son. To add to his younger brother's pain and confusion, Zai informs Oscar that Jack is not only responsible for the deaths of Rachel and his son, but also the deaths of Duchess Vessalius and Oscar's own son. Finally, Zai has the Baskervilles take Ada as their hostage, using her as blackmail in order to force Oscar to track down Oz and kill him, Oscar having agreed to do so to buy some time to figure out his confusing emotions; rage over the deaths Jack had brought to his family, and reluctance to do harm to one of the children he'd treated as his own son for 25 years.
After Oscar's departure, Zai himself departed; leaving Ada in the care of the Baskervilles while he was gone. Zai arrives in Pandora shortly after Gilbert had helped Oz escape his execution by Oswald's hand using Raven. Zai witnesses Oswald's order to his valets to find and execute both Oz and Gilbert (for being a traitor to the Baskerville Clan). With the majority of Oswald's valets tracking Oz and Gilbert throughout the catacombs of Pandora, Oswald, Lottie, Zai and Rufus discuss with one another the progress that they're making, with Zai telling Oswald that Oscar had likely joined forces with Oz and Gilbert and that the three of them would likely be heading towards St. Luca's Gate; which is an emergency exit out of Pandora, meant for the use of the Four Great Dukes should it be needed. However, because St. Luca's Gate is used so rarely, a Key to the Abyss is necessary for the Gate to be opened.While Lottie questions Rufus as to why he didn't disclose information about St. Luca's Gate, Oswald questions what benefit Zai would have from informing him about St. Luca's Gate and thereby betraying his own family. Zai's reasoning for his actions against the Vessalius Dukedom, as he identifies it, is that he has always wanted to destroy Jack and everything that he's striving for, and thus the container for what remains of Jack's soul (Oz) is a medium for his hatred toward Jack.
Suddenly, eight members of Pandora come out of hiding and attempt to condemn Oswald, believing that Jack's word is absolute and that Oswald's words of the impending destruction of the world is nothing more than his attempt at manipulating the populace. The Pandora members hold Zai, Rufus, Lottie and Oswald in their places with their guns, explaining that they believe that Oswald intends to use these lies in order to plunge the world into the Abyss, so that he may obtain the Intention of the Abyss and monopolize her power. This causes Oswald to laugh hysterically, stepping forward to attempt to explain what kind of person Jack really is, but the Pandora members silence him and summon Rocking-Horse-Fly and an unknown lizard-like Chain in retaliation. Oswald simply summons Jabberwock and kills all the Chains and their Contractors except one. This Pandora member calls out for guidance from Jack, Oswald approaching him and stabbing Elliot's black-bladed rapier through the mouth of the Pandora member.
Following this confrontation, Oswald orders Zai to lead Oswald's valets to St. Luca's Gate in order to stop Oz, Oscar and Gilbert from escaping with their lives. Meanwhile, Oswald takes his leave for Sablier with Rufus, Vincent, Lottie, Lily and Dug. With Oswald no longer around, Zai leads Zwei, two Pandora members and two other Baskervilles through the catacombs of Pandora, intending to allow Oscar to open St. Luca's Gate so that he'd reveal the Vessalius Key to the Abyss, yet still allow Zai to go after Oz.Zai arrives in the chamber after Zwei had mortally wounded Oscar. Oscar uses his Key to close St. Luca's Gate, thus preventing Zai from going after Oz, Gil and Alice after they'd gone through St. Luca's Gate. Zai calls the Pandora members annoying because they were worrying about Oscar's safety, as he proceeds through the chamber, noticing Oscar's necklace and telling him that it was just like Oscar to have made Sara's wedding ring the Vessalius Key, stating that Oscar's sentimentality was always something he couldn't stand. Oscar realizes that Zai had only forced Oscar to go after Oz so that he'd reveal the Vessalius Key, explaining that because St. Luca's Gate can't be opened immediately after being shut, Zai wouldn't be able to go after Oz. Zai draws his gun and aims at Oscar, asking if Oscar regrets his decision. Oscar denies having any regrets because he was able to tell Oz and Gilbert everything he wanted to and because Oz was now safely in Gilbert's care as he'd wanted. Zai stated that Oscar's sentimentality was always something that he couldn't stand about Oscar, which Oscar had always known. Oscar tells Zai that despite this, he'd always hoped that one day the two of them could grow to understand one another. Zai doesn't respond to Oscar, simply pulling the trigger as Oscar closes his eyes and accepts his death. Zai then takes the Vessalius Key from Oscar's corpse and leaves with the rest of the Baskervilles.
Zai's full face is never revealed. Oz hadn't seen Zai in so long that he'd forgotten what Zai looked like, which is why his full profile wasn't shown in earlier chapters, but when he appeared physically in Retrace XL: Blindness, it is unknown why his full profile was still not shown. Zai has blonde hair and a large diagonal scar across his face, reaching from his forehead to his cheek across the bridge of his nose. In his first appearance Zai was clean shaven, but appears to have allowed a goatee to grow out after ten years.
Zai's personality is initially a lot like Bernard's personality, being somewhat greedy and hungry for information, however Zai has displayed that he values his family in a more sensible way than Bernard, as Bernard was willing to accept the deaths of his entire family in the pursuit of honor, where as Zai cared deeply about his wife Rachel and his son who had been born in death's embrace, only replacing the corpse of his dead son with an infant form of Jack because he did not wish to put Rachel's heart through so much pain.
Since the switch, Rachel, Duchess Vessalius and her child have also died, which Zai blames completely on Jack and Oz's presence in their family as 'Oz Vessalius'. In return, Zai began dehumanizing Oz ever since the string of deaths began (calling Oz filthy and claiming that he should never have been born) in hopes of exacting revenge on Jack and hurting Oz, showing that Zai has since become consumed with rage, hate and the want for revenge because of Jack's manipulation of him and his family. In pursuit of this, Zai has even held his own daughter hostage in order to get Oscar to kill Oz for him, proving that there is no lengths which Zai will not go to in order to get even.However, this sense of rage does not only show in Zai's treatment of Oz, as Zai is shown to treat his younger brother, Oscar, rather horribly as well as he is always talking down to him and calling Oscar 'good-for-nothing', as well as fellow Baskerville Zwei, whom gets on Zai's nerves from time to time because of his lack of patience for her.
Zai's preferred weapon of choice is a long, thin-bladed rapier, which Zai was shown to wield left-handed.
Powers and AbilitiesEdit
- Considerable swordsmanship
Gryphon, is one of the five Black Feathered Chains that Glen Baskerville used to possess, making it able to open a path to the Abyss and summon the Chains of Condemnation to drag people into the Abyss. It is unknown what secondary powers Gryphon may have.
Ada hasn't interacted with Zai in the series as of yet because he is often away from the Vessalius Mansion. Although Zai is often absent in Ada's life, his strict rule as her father is abundantly clear, as Ada often mentions how she is not allowed to bring friends to the Vessalius mansion because of her father's rules. Vincent theorizes that this was because if Ada was going to bring a boyfriend home, the Vessaliuses would rather that she did it where they couldn't see.
Later, when Zai and the Baskervilles cross-examined Oscar and Ada, telling them the truth of Oz's existence, Ada found it hard to believe her father, dropping her teacup to the floor in shock. Zai would later take Ada hostage in order to prompt Oscar to do as Zai commanded, and so Zai ordered Oscar to kill Oz with his own hands. While it does seem as though Zai cares for Ada, setting strict rules in order to protect her as any other father would, however it seems as though Zai is willing to use Ada as encouragement for Oscar in the pursuit of revenge.
Despite the fact that Bernard allegedly hated all the Vessaliuses with every fiber of his being, having taught Fred, Claude, Ernest, Vanessa and Elliot to hate them as well for forcing the Nightrays 'into the dark', he seemed to have a rather close relationship with Zai for reasons that have never been disclosed. Both Zai and Bernard aligned themselves with the Baskervilles around the same time (and possibly together). As well, following Oz's Coming of Age Ceremony, Gilbert had seen Zai's face before he cast Oz into the Abyss using Gryphon, because of this Gilbert told Oscar about it as soon as possible. Oscar looked into the matter, however Bernard provided Zai with a fake alibi, explaining that Zai had been with his during the entire duration of the Coming of Age Ceremony, forcing Oscar to give up his investigation. Some 10 years later, Bernard and Zai had both traveled to Sablier for the Baskervilles in order to look for the first Sealing Stone alongside Lottie, Fang, Dug and Zwei. When Bernard had gotten wind of Elliot's travel into The Hole, he sent Zai in to retrieve Elliot because his legs were no longer fit to make the journey, showing that Bernard trusted Zai with his youngest son. Whether or not their relationship will receive an explanation or justification is unknown.
As Bernard had successfully warped Elliot into thinking that the Vessaliuses were the reason that the Nightrays were forced to work 'in the background' because they were labeled traitors during the Tragedy of Sablier while the Vessaliuses got to move freely 'in the light' for being labeled the heroes of the Tragedy (which later turned out to be true because of Jack spreading rumors about Raymond Nightray in order to keep the Nightrays where he wanted them), Elliot had it in his mind that Zai Vessalius was scum. Elliot openly disliked Zai, refusing his escort after Bernard had sent Zai to retrieve Elliot. Elliot instead told Zai to redirect his offer to Oz, but Zai refused and stated that something like Oz should never have even been born. This made Elliot furious, causing him to lash out at Zai for his dehumanization of Oz.
When Jack had first approached Zai, Zai was rather skeptical that Jack was exactly who he claimed to be. It wasn't until Zai's first born died after birth, just as Jack had predicted, that Zai believed that Jack was whom he claimed to be. Zai planned on using Jack in order to obtain information, as well as a means to spare Rachel too much heartache over the loss of her child, but he did so in a bitter and hateful way, taking the dead child from Rachel and storming off angrily into the night.
As the years went on, nothing but tragedy followed the Vessalius family after Zai had taken Jack's body into the Vessalius family as 'Oz Vessalius'. Not only had Oscar's own child died, but his wife as well, Rachel's own death was followed sometime after Ada's death, all of this Zai blamed Jack for. Zai planned on exacting his revenge on Jack and Oz through a process of dehumanization, with Zai deteriorating Oz's sense of hopefulness through his harsh treatment in hopes that Jack would feel the repercussions. To fuel his hunger for revenge, Zai aligned himself with the Baskervilles, hell-bent on sending the being known as Oz Vessalius into the Abyss, where its existence couldn't be of harm to anyone. Zai would've much rather destroyed Jack's body and Oz along with it, but had he done so, the Intention of the Abyss would have surely intervened.
Despite the fact that Zai is a Vessalius rather than a true Nightray, Lottie seems to be on fairly good terms with him, the two of them being able to make conversation as equals. Lottie had only ever once spoken of Zai on a higher basis than herself, and that was when she explained to Break what Zai had told her about Oz and the actions that the Baskervilles needed to take against him. On their way to the Baskervilles' Door to the Abyss, Lottie and Zai casually talked to one another, discussing how Oz had wandered into that region despite the fact that he shouldn't have been able to.
Despite the fact that Zai is Oscar's older brother, the two do not have a good relationship with one another. Despite this poor relationship, Oscar still asked Zai to form a contract with Gryphon because Oscar himself lacked the right qualities to do so successfully. Some 10 years later, Oscar glared at Zai furiously and stood in front of Ada when Zai confronted them alongside the Baskervilles when they were trying to escape Reveille following the severing of the Chains, however a part of this could have been drawn from Oscar's ignorance to Zai's reasoning for treating Oz so poorly.
Zai doesn't seem to enjoy his younger brother's company, often talking down to Oscar and calling him a lowlife, but Zai does note the importance of Oscar and Ada knowing the truth about Oz. However, because Zai has become so consumed with rage in his pursuit of revenge on Jack after blaming Jack for Rachel's, Zai's first born's, Duchess Vessalius' and Oscar's child's deaths, he is shown to not be above using his family in their time of vulnerability in order to force them to help him exact his revenge. Zai did this by keeping Ada as a hostage within the Vessalius mansion, ordering Oscar to go and kill Oz with his own hands, something which Oscar regrettable complied to.
Oz the B-RabbitEdit
Oz had grown to believe that he should love his father, however unbeknownst to Oz, Zai was not his real father. Oz was a Chain existing in Jack's de-aged body, and Zai had despised Oz his entire life in part because of his sinful existence, but mostly because he had hoped to hurt Jack through his dehumanization of Oz, where Zai had often called Oz a filthy and vile creature, or would state that Oz should never have been born. After spending fifteen years successfully hurting Oz, Zai joined forces with the Baskervilles so that they could confirm that Oz was the child mentioned in the prophecy, and subsequently cast Oz into the Abyss as a result. Although Zai would've much rather have had Oz killed, he knew that something like that would have been impossible without the Intention of the Abyss intervening because of her connection to Jack, and so Zai would've had to settle for Oz being trapped in the Abyss.
Zai's relationship with Zwei is mostly built off of annoyance and a lack of respect which Zai hold for Zwei. While the two worked together during Oz's Coming of Age Ceremony, Zai felt it was necessary to check to make sure that Zwei had complete control of Gilbert with Duldum on more than one occasion, Zwei showing clear annoyance with the question and answering that she had it abruptly in order to end the conversation. In the Anime Zai seemed rather annoyed after Zwei had lost control of Duldum whilst she was in Gilbert's body, prompting Duldum to attempt to kill Oz, while in the manga, Zai didn't seem to notice that Zwei had lost control. Ten years later, while in Sablier with Bernard, Lottie, Fang, Dug and Zwei, Zai was forced to carry Zwei because Zwei had fallen unconscious after being attacked by Break, needing time to heal her wounds. When Lottie and Zai had finally reached the Baskervilles Door to the Abyss, Zai saw no need to carry Zwei any further, dropping her at his first opportunity and leaving her on the ground, so that he could focus on his conversation with Lottie and Lily's release from the Abyss.
- "A child like that should never have been born."
- "Don't touch me, you vile creature."
- (About Oz) "Whatever becomes of it... is none of my concern."
- (About Leo) "You have a good valet. He... rightfully knows his place."
- "I see I was right. I had a feeling you would come after me."
- "Yes... you did. When was that again? You suddenly pointed a gun at me and impudently dared to say this. You went on spouting tales about how the Chain that dropped it into the Abyss was our Vessalius House's Gryphon. How about it? Would you like to make sure once more?"
- "Is the Chain you claim to have seen... still... smiling with the same face as this one?"
- "Where are you hurrying off to? How long has it been since we spent some time together, as a family? Or rather, how many times have we ever had the chance to? This is the perfect opportunity... for a nice long family talk. "
- "About twenty-five years ago, a boy showed up before me... he said that... he had been forsaken by the Abyss. He said that... he had been alive... for over a hundred years."
- "Oscar, you knew it, didn't you? You knew that Oz was not my son?"
- "Just as that boy had foretold... my son was still born. I replaced my son's cold body... with Jack Vessalius'... who had regressed into an infant."
- "Of course, I was reluctant at first. But that boy- that man- gave me solid evidence that he was really Jack Vessalius... by telling me lots of things that only Jack could know. I thought that if what he said were true... his final wishes should be inherited by a member of the Vessalius Dukedom. And in doing that... I could also spare my wife from the grief of losing her child. However. I came to discover the truth... Although, that was probably a part of his plan as well. Up until now I've been a mere puppet in his hands."
- "My son! Jack Vessalius killed him!! Not only him, but my wife as well!! And the same goes for your son, Oscar!! They were all murdered in order to fulfill that man's plans!!"
- "Oscar, kill that thing (Oz) with your own hands. That will make him suffer most. That is... my revenge against that man."
- "Oscar, how long are you going to play 'happy family' for? Why are you hesitating when that thing has caused you nothing but suffering?"
- "They're probably heading towards the St. Luca's Gate."
- "It's a corridor leading to an emergency passageway reserved for the use of the Four Great Dukes. Normally, it's entrance is sealed and only the head of the family can come and go using their Key to their Door to the Abyss."
- "My only purpose is preventing Jack from reaching his goal. That thing that carries Jack's soul within him is just another target for my grudge." (In response to Oswald asking why Zai would betray his own family).
(*) - Denotes that the character did not appear physically, but as a part of other characters' memories.
- Zai's name means 'River'.
- Zai appears to be ambidextrous in some instances.
- It is not known why Zai did not take on the role of Duke as the older sibling between himself and Oscar.
- Zai's hunger in knowledge bears significant similarity to the personalities of fellow Pandora members, Rufus Barma and Bernard Nightray, as well as foreigner Isla Yura.
- Zai's arrogant personality mirrors the Gryphon's lack of care for what others think in Alice's Adventures in Wonderland, as the Gryphon shows his disdain for both the Queen and the Mock Turtle, saying one doesn't realize no heads ever fell despite her orders, and the other's despair is ridiculous.
- Zai's name is misspelled as 'Xai' by Yen Press in the English versions of Volume 10.