In Corpse Party, giving off the aura of a delinquent, Yoshiki faces difficulty in school due to issues at home. Being disowned by his parents, he rents a cheap apartment and works part-time to support himself. At one point, Yoshiki considers getting himself expelled from Kisaragi Academy, since he could not find a reason to continue attending if he didn't have an interest. However, Ayumi Shinozaki changes Yoshiki's mind on the matter after standing up for him against their P.E. teacher, Mikio Tsubota. Carrying over from his attitude at school, Yoshiki is prone to outbursts of frustration when faced with difficult situations. Though he often means well, his actions can appear cold or even selfish to those around him.