Girl #8 Kayoko Kotohiki is a playful, energetic girl who is a member of a flower arrangement class. She is unaware that Hiroki has a crush on her. She hides during most of the game, avoiding confrontation, until Hiroki finds her.
In the novel and film, the frightened Kayoko shoots Sugimura. After he dies, Mitsuko kills Kayoko. In the manga, the two travel together, but are gunned down by Kiriyama.(Source: Wikipedia)