A delinquent student with a good nature. Yoshiki is disowned by his parents, and lives alone in an apartment but is visited by his younger sister, Miki, who offers sympathy with his situation. He considered getting himself expelled from Kisaragi Academy, since he couldn't find a reason to continue attending. However, Ayumi's intervention during Yoshiki's argument with his gym teacher changed his mind, and it is suggested he carries strong feelings for her.

    In Corpse Party: Book of Shadows, Yoshiki and Mayu accompany Nana, while searching for Ayumi

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