Nicknamed Hikarin. Ability: Just glowing. The same person as Hikaru Tata. Became a girl after falling into a spring that changes your gender. First person: I (casual/masculine) Second person: Mostly refers to others by their surnames. Turns into a boy when slurping hot noodles, and turns into a girl when eating cold noodles. Note: Do not use the name Hikari when he is in his Hikaru form. The straight man/tsukkomi role.

Nicknamed Hikarun. Ability: Just glowing. The same person as Hikari Tata. First person: I (casual/masculine) Second person: Refers to others by their surnames. Turns into a boy when slurping hot noodles, and turns into a girl when slurping cold noodles. Note: Do not use the name Hikaru when she is in her Hikari form. He's a loner/introvert, but has many friends. The straight man/tsukkomi role.

Ability: Averaging. When he takes damage, he can disperse it into the surrounding ground. He understands the logic behind Hikaru turning into a girl. First person: I (casual/masculine) Second person: Hikaru-kun Hikaru finds him annoying. Acts as a mentor figure to Hikaru.

Ability: Black Hole. First person: I (casual/masculine) Second person: Names without honorifics. Fell in love with Hikari at first sight. Hasn't realized that Hikaru and Hikari are the same person. Goes by Masa, but Hikaru calls him Kuroi.