AoBunny is one of the five teachers of Hope's Peak College's Class B-3 and a mascot of the story. They are a robot raised by Senri Endo and are looked after by the main creation, MonoBunny. Despite them having the same messed up beliefs as Senri, and a sociopathic headmaster as a result, them being a robot makes them lack the mental experience to relate to the other students besides Senri, and doesn't know what mental states than do to people. Despite the lack of empathy towards humans, they value the lives of the other monobunnies and especially their master Senri.

Each of the five younger Monobunnies represent a specific characteristic of Senri Endo, only exaggerated. AoBunny, being the blue bunny, represents the depression and loneliness of being in the same place over and over.

AoBunny is the depressed one who just needs to hold up that emotion and not break that emote otherwise. 

ALL the monobunnies are genderless and use they/them pronouns. Anyone can try out for this role.