Koyuki — Demon Slayer: Kimetsu no Yaiba Infinity Castle Character Profile

About Koyuki

Upper Rank Two demon, former human who chose to stay with Doma.

Koyuki — Character Profile

Alignment

Villain

Species

Other

Abilities

Upper rank power, Demon slaying, Compassion, Tragic backstory, Bound loyalty

• Strength: 6.5/10
• Intelligence: 6/10
• Charisma: 7/10
• Morality: 5/10
• Influence: 5.5/10

Character Facts

Played by

Lynn

Appears in

Demon Slayer: Kimetsu no Yaiba Infinity Castle (2025)

Role

Supporting

Relationships (2)

• Koyuki — Romantic Former Fiancée — Akaza (Akira Ishida)

  Akaza and Koyuki were deeply in love before his transformation.

• Koyuki — Family Adopted Daughter — Keizo (Yuichi Nakamura)

  Keizo raised Koyuki as his own daughter after her parents' death.

Explore the full interactive character relationship map of Demon Slayer: Kimetsu no Yaiba Infinity Castle

More characters from Demon Slayer: Kimetsu no Yaiba Infinity Castle

• Tanjiro Kamado (Natsuki Hanae)
• Giyu Tomioka (Takahiro Sakurai)
• Inosuke Hashibira (voice) (Yoshitsugu Matsuoka)
• Muzan Kibutsuji (voice) (Toshihiko Seki)
• Akaza (Akira Ishida)
• Zenitsu Agatsuma (Hiro Shimono)
• Genya Shinazugawa (voice) (Nobuhiko Okamoto)
• Tengen Uzui (voice) (Katsuyuki Konishi)
• Muichiro Tokito (voice) (Kengo Kawanishi)
• Kaigaku (Yoshimasa Hosoya)
• Gyomei Himejima (voice) (Tomokazu Sugita)
• Doma (Mamoru Miyano)