Aoi Kanzaki (神崎 アオイKanzaki Aoi) is a supporting character ofDemon Slayer: Kimetsu no Yaiba and a Demon Slayer of the Demon Slayer Corps. However, she works as a helper at the Butterfly Mansion, rather than taking to the front lines and fighting demons.
Aoi is a young girl of slightly below average height with deep blue eyes that fade to a lighter blue at the bottom, along with white rectangular pupils, straight black hair with a parted fringe, and twin-tails. She wears two blue butterfly clips to keep her twin-tails in place.
Aoi wears the standard Demon Slayer uniform with the addition of a white nurse dress on top of it, with a blue sash around her waist. Her uniform is tinted slightly blue. She is often seen with a frown on her face.
As Aoi trained Tanjiro Kamado, Zenitsu Agatsuma, and Inosuke Hashibira, she is very tough on them and often pushes them to their limits. She has a firm personality, unlike her colleagues at the Butterfly Mansion.
Aoi's personality is somewhat similar to the young version of 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.
Overall Abilities: As someone who passed Final Selection, Aoi has above average fighting abilities and physical capabilities. However, she isn't on par with Demon Slayers such as Tanjiro Kamado, Zenitsu Agatsuma, and Inosuke Hashibira as she doesn't spend time training to fight demons or go on missions, but rather chooses to be a helper in the Butterfly Mansion, helping injured Demon Slayers to recover.
Medical Knowledge: After training under Shinobu Kocho, Aoi is able to concoct most of the more simple medicines and use them to treat injured patients.
Trained Craftmanship: Aoi is knowledgeable and skillful enough to repair Nezuko's box which was damaged by Sanemi's blade.
Breathing Style
Water Breathing: (水の呼吸 Mizu no kokyū): Aoi was a user of Water Breathing when she took Final Selection. Despite her surviving Final Selection, she believed it was nothing but pure luck and decided to stop training with the Water Breathing and instead helped other Demon Slayers within the Butterfly Mansion.