Kisaragi Hikaru is a scholarship student in equestrianism. Hikaru transferred to Clamp School two months ago and currently is in fifth grade of the elementary school.
Hikaru is actually a girl who pretends to be a boy. The reason she hides her identity is because she is trying to fulfill her brother's dream to become a champion at equestrianism.

She have been sending threat messages to Imonoyama Nokoru, ordering him to cancel the ball. She fell in love with Nokoru. She would rather have ball cancelled than to see someone else dancing with him.