Yoshiki Kishinuma

Yoshiki is a weak swimmer.

His natural hair color is actually black not blonde as and remains definitive in all versions as Toshiki reveal he dyed or bleach his hair blonde because his parents misunderstood him.

Despite his delinquent appearance and troubled home life (he was disowned by his parents and lives alone while working part-time), his younger sister Miki is the only family member who still regularly visits and looks after him.

Yoshiki’s nickname “Knight” (ナイト / ナイトくん) was given to him by Azusa Takai because of the “kishi” (岸) in his surname Kishinuma.

Yoshiki is an uncaring, rebellious boy with little to no care of anyone other than Ayumi.

During the Heavenly Host Saga, 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.

Yoshiki is a former student of Kisaragi Academy Senior High School's classroom 2-9 and one of the five original survivors of Heavenly Host.

Yoshiki is seen wearing a white shirt, black undershirt, dark green pants and brown shoes. His eyes are red with a slightly visible hue of dark pink and short black hair.

During the Heavenly Host Saga, Yoshiki is a teenage boy of average build and height with gray eyes and short, bleached, somewhat-spiky hair.

He wears the standard Kisaragi Academy Senior High male uniform consisting of a dark gray gakuran fully unbuttoned, white shirt untucked and partly opened, red shirt, light gray socks and white uwabaki slippers with blue stripes near the soles. His student ID is pinned on the left side of his shirt.