Aoi Kanzaki/Relationships

Tanjiro Kamado
Aoi and Tanjiro seem to have formed a friendship. Tanjiro respects Aoi for her help and care while he, Inosuke, and Zenitsu resided at the Mansion. He also thanks her for her work and assistance, which she seems to appreciate. He intervenes for her when she was being kidnapped by Tengen, and defends her when Tengen says she isn't useful by saying that everyone has their own circumstances. When Tanjiro leaves the Butterfly Mansion, Aoi says she enjoyed their time together.

Kanao Tsuyuri
How close they are is somewhat uncertain, but the two get along and seem to have a somewhat sisterly relationship. Kanao attempts to stop Tengen from taking Aoi with him at a time when it was highly unusual for Kanao to make her own decisions or go against her orders. As seen in the novel, Aoi previously thought of Kanao as difficult to deal with, since she never showed her own emotions. She also felt inferior to Kanao, since Kanao could fight demons and Aoi could not. However, once Kanao starts to open up and make her own decisions, Aoi and her begin to grow closer.

Shinobu Kocho
Shinobu is Aoi's mentor in the field of medicine and likely oversaw some or all of her demon hunter training as well. Aoi thinks highly of Shinobu, like all the other butterfly girls. Shinobu cares for Aoi and feels sympathy for how her family was killed by demons. She also seems to feel some anger on Aoi's behalf, remarking that none of the butterfly girl's families would have been killed if it weren't for Demons during her fight with Doma.

Inosuke Hashibira
They met each other, for the first time, at the Butterfly Mansion. At the beginning, he struggles to beat Aoi in all of the tasks due to not having a strong will. Later on, he is finally able to adapt and beat her. In comparison with Zenitsu and Tanjiro, he was more harsh against her. He was one of the slayers who volunteer in Aoi's place to go to the mission to Yoshiwara with Tengen. After the fight against Upper Rank 6, he's carried one more time to the Butterfly Mansion. Aoi is visibly sad about Inosuke's terrible condition, since he had poison through his body and she thought it was too late to stop the bleeding. Her tears were quickly dispelled however, as he drops off the ceiling. She starts to see him as a pain and starts to argue with Inosuke again. At the Butterfly Mansion after the final battle, he goes out of Tanjiro's room and heads to the kitchen to get some food. He tries to steal food behind Aoi's back, but she notices him. She hands him over a rounded tray of food that is made only for Inosuke and tells him that he can eat how much and whenever he wants from that tray. After this gesture, Inosuke visibly starts to see her in a good light. Eventually, she and Inosuke Hashibira marry and have a great-grandson named Aoba Hashibira.