One of the main protagonists of the Kara no Kyoukai novels. She is a teenage girl who possesses the Mystic Eyes of Death Perception, a supernatural ability that allows the user to see the inherent mortality of everything (both living and non-living) in the form of lines.
During the Fate/Grand Order collaboration event with Kara no Kyoukai, she can be acquired as an Assassin-class Servant. She can also be summoned as a Saber-class servant known as Void Shiki using the Kanesasa Kuji, where she appears in a more formal kimono. She gained a swimsuit version in the 2026 Chaldea U-Summer Island event.
