Kuina Ubuyashiki ( (うぶ) () (しき) くいな Ubuyashiki Kuina?) is the youngest daughter of Kagaya Ubuyashiki. She currently serves her older brother, the current head of the Ubuyashiki Household, Kiriya Ubuyashiki.


Kuina has features similar to the rest of her family, light, pale skin with a set of large eyes. She wears a white blunt bob with fringe covering her eyes.

Kuina is usually seen wearing a purple, flower-patterened kimono like her twin sister. She adorns her hair with a short flower headpiece with two beads hanging off it.




First Mission Arc

Abilities and Powers

  • Extraordinary Memory - During the infiltration of the Dimensional Infinity Fortress by the Demon Slayer Corps, Kuina displays exceptional memory and skill in map making, having successfully mapped out and memorized the entire structure, despite the fortress constantly changing. She also provides real-time logistical information to the Pillars alongside her sister, aiding her brother in planning the route to Muzan Kibutsuji's location.


  • Kuina was the last member of the Ubuyashiki Household revealed.
  • Her older sisters were born as twins. She has one older brother and an identical twin.




Community content is available under CC-BY-SA unless otherwise noted.