Kimetsu no Yaiba Wiki
Kimetsu no Yaiba Wiki

Kuina Ubuyashiki ( (うぶ) () (しき) (くい) () Ubuyashiki Kuina?) is one of the youngest daughters 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.


Kuina displays her strong sense of loyalty and devotion to her brother as the new head of the Ubuyashiki Family and Commander of the Demon Slayer Corps, by being the one to forcefully remind him of his duties as their leader. She even resorts to physical force to remind him of this by slapping him, in order to ensure he did not break down under the stress of his responsibilities.[1]



Infinity Castle Arc


Extraordinary Memory: During the infiltration of the Infinity Castle 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 castle constantly changing. She also provides real-time logistical information to the Hashira 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.
  • She has good physical abilities. She's called the "slap princess", since she tends to slap people when she overreacts emotionally. Although, she ends up regretting it every time.[2]



  1. Kimetsu no Yaiba Manga: Chapter 181 (Pages 1-4).
  2. Kimetsu no Yaiba Manga: Vol. 21, Extra Pages.