Aoi Kanzaki is a Demon Slayer, though she works as a helper at the Butterfly Mansion rather than taking to the front lines. __Appearance__ Aoi has deep blue eyes that fade to a lighter blue at the bottom, along with white pupils, straight black hair with a parted fringe, and twintails. She wears two blue butterfly clips to keep her twintails in place. As Aoi is a Demon Slayer, she wears the standard uniform with the addition of a white nurse dress on top of it. Her uniform is tinted slightly blue. She is often seen with a frown. __Personality__ As she trained Tanjiro Kamado, Zenitsu Agatsuma, and Inosuke Hashibira, Aoi is very tough on them, often pushing them to their limits. She has a firm personality, unlike her colleagues at the Butterfly Mansion. Aoi's personality is somewhat similar to that of the young Shinobu Kocho, volatile and open. She often appears angry, generally displaying how she feels very clearly. However, she does occasionally express more tender emotions such as declaring her enjoyment of the time spent with the trio when they were at the Mansion, looking openly surprised at Tanjiro's reassurance towards her, and bursting into tears when discussing Inosuke's serious injuries. Despite her somewhat gruff demeanor, she is internally kind and caring, doing her best to help the hunters that come to the Mansion. __History__ At some point, Aoi's family was killed by Demons. As a result, she was taken in by the Butterfly Mansion, where she received breath training. Aoi managed to survive the Final Selection, though she claims that it was through pure luck. She was too afraid to go in to battle despite passing the Final Selection and as a result, decided to work at the Butterfly Mansion instead. She seems to undervalue her own work, claiming that she isn't doing much compared to full fledged hunters. Although she cannot fight, she is well versed in medical knowledge and was presumably taught by Shinobu. She helps with the upkeep of the Mansion and cares for injured hunters.