In the Manga she appears to be developing romantic feelings for Oz and in the anime series it is heavily implied as well, as a common occurrence of her jealousy when Oz is with other girls (even his own sister) and when she dislikes him leaving her alone is often. When Oz discovered much to his horror, that Alice was murdered during the Tragedy of Sablier, Oz loses control of his power. When Gil found Oz, Oz declared in a maddened state that he destroy everything in the his path to ensure that Alice will never scared or sad. Shortly after he regained himself, Oz declared to Alice that she should just be herself.
In the past of Sablier, Alice often played rough with Oz, her toy rabbit. Despite this, Alice loved Oz, and Oz loved to see her smile. Alice tells Oz that he made her happy before she kills herself to prevent the Intention of the Abyss from taking over her body to help Jack Vessalius plunge the world into the Abyss, and keeping Jack from hurting Oz.
When Gilbert shoots Oz on the command of Oswald/Glen/Leo, Alice begins to scream. When she tries to approach Oz, right before she disappears, she still calls Oz by name, not caring about what would become of herself. After Alice remember that Oz rejected her, she immediately cried and called Oz an idiot for rejecting her. When she heard Oz's voice calling her, she hugged him upon their reunion and immediately asked him what took him so long to call her, with tears in her eyes.
Alice always calls Gil "seaweed head," to which he responds "stupid rabbit." She is always arguing with Gil, usually over Oz.
It's not known if she herself met Gil 100 years ago since the one who made him do the "face" again was most probably the Intention using her body.
Though Gilbert and Alice fight a lot, there are some scenes that show he does care for her. In later chapters it also seems as though she's started to look up to Gil like an older brother, something that he rejects instantly. She appears to like it when Gil ruffles her hair.
She was worried when she saw his arm was gone, so that means they have started to respect each other.
Alice and the Intention of the Abyss are twin sisters, and Alice said that she could communicate with her while she was in Abyss.
At first, it seems they hate each other, however neither of them possessed their memories at the time when Alice was still alive. Due to their memories lost, they appear to not be on good terms with each other, but they do have some things in common. One thing both sister shared in common is their bond with Oz; although Oz developed a close bond with Alice (B-rabbit), he nevertheless cared the Intention as well. Both sisters care deeply about each other.
However, as revealed in Chapter 63, the Intention of the Abyss wished for Break to help save Alice; this showed that despite everyone's belief that the Intention hated Alice, in reality she cared for Alice so much .
When Alice sacrificed herself for Oz and was about to die, Alice (the Intention) screamed in sorrow and ran towards her dying soul, crying (this happened in the junction between their souls. the only place where they can meet). Alice (B-rabbit) said she was happy, that her sister was the same as always and that it was a long time since they'd spoken to each other like this, because Alice (the Intention) hadn't answered to her calls recently. The Intention cries and apologizes and says that even the things she hold dear seem to lose their importance to her. In addition to this she promises to use Oz's power to erase her own memories, but when she uses Alice's body to reach him, Alice's soul flies past her and enters Oz. To help both her sister and Oz she takes Oz's power and destroys the Intention's memory, though in reality she destroyed her own as well, because the two were connected to each other.
Alice and Sharon both care about each other, as shown when Sharon got depressed about how Break didn't tell her about Sablier, Alice tried to cheer her up by biting her cheeks. Overall, the two seem to be good friends.
Break tells Alice to look after Oz, which means by now he has grown to respect her.
Lacie is an anagram of Alice. It is confirmed that Alice is the daughter of Lacie and Levi. Lacie and Alice share many similar traits such as their dark hair. While Lacie has red eyes, Alice has a red color scheme. Also, while Lacie appears to be romantically interested in Jack, Alice seems to be romantically interested in Oz, who is also a Vessalius but is in fact her stuff rabbit given human form by taking over Jack's body. Oz was also Lacie's stuffed rabbit as well as friend.
Lacie and Alice have never met, but through Lacie's last conversation with The Core of the Abyss, Lacie says sadly that "If you (The Core of the Abyss) should meet this child of mine... please try to be friends." Although Lacie never had the chance to see her daughters, this moment show her concern and love, however brief her time to demonstrate this was.
Oswald and Alice seemed to get along more often than Oswald did with the Intention of the Abyss. He often corrected her boyish way of speaking. When he came to bring her food she smiled happily at him and told him that she purposely switched places with the Will of the Abyss so she could see him as the Intention did not like him. Alice also named her stuffed rabbit after him as she called it 'Os' at first until Levi corrected the spelling to being 'Oz'.
Oswald was also shown to be quite protective of Alice, rushing to her aid when she screamed at Jack for hurting her toy rabbit, Oz. Despite her anger and panic, Oswald calms her down simply by placing a hand upon her shoulder. After stating that Lacie cannot return to them, Oswald helps Alice up and walks a few paces away with her. Whether Oswald knew she was his niece or not, he treated her as such, caring for her as though she was his daughter.
Eventually, Cheshire grew closer to The Intention and came to hate Alice. However, he protects her when necessary to prevent the Intention of the Abyss from feeling sadness from her death.