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Aoi Kanzaki

The Butterfly Mansion Helper, Former Water Breathing User
Aoi Kanzaki


Aoi Kanzaki is a supporting character in Demon Slayer: Kimetsu no Yaiba. She is a Demon Slayer who works as a helper at the Butterfly Mansion rather than fighting on the front lines. Aoi passed the Final Selection but chose to assist in rehabilitating injured Demon Slayers instead of actively battling demons.

Personality and Appearance

Aoi Kanzaki wearing her uniform

Aoi is a young girl of average height with straight black hair styled in twin tails, held in place by two blue butterfly clips. She has deep blue eyes that fade to a lighter blue at the bottom, with white rectangular pupils. Aoi wears the standard Demon Slayer uniform with a white nurse dress on top and a blue sash around her waist.

Tough, uncompromising, and strict, Aoi displays an efficient and no-nonsense attitude. She is effective and proactive in her duties at the Butterfly Mansion. Despite her gruff demeanor, she is kind and caring, doing her best to help injured Demon Slayers recover. Aoi harbors insecurity about her abilities as a Demon Slayer, believing her survival of Final Selection was due to luck.

Abilities and Fighting Style

As someone who passed the Final Selection, Aoi has above-average fighting abilities compared to ordinary people. However, she is not on par with active Demon Slayers due to her focus on support roles. Her key abilities include the following.

  • Medical Knowledge: Trained under Shinobu Kocho to concoct simple medicines and treat patients.
  • Trained Craftsmanship: Skilled enough to repair damaged equipment like Nezuko's box.
  • Water Breathing: Former practitioner, but stopped training after Final Selection.


  • Aoi's name is written in katakana but likely means "blue."
  • She was in the same Final Selection as Muichiro Tokito, the Mist Hashira.
  • Aoi wanted a sister and pestered Kanao Tsuyuri to choose her last name.
  • In Kimetsu Academy, she's a second-year high school student in the Flower Arrangement Club and volunteers at the school canteen.
  • She helped choose Kanao's name by swapping name papers during the selection process.

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