Kotarou Kobayashi

Kotaro is a 12 year old middle school classmate of Misaki whom he has a crush on as well as Hatoko039s brother. He is always being assaulted by Tamayo and her various martial arts techniques which he has been a victim of since he was four years old. He becomes jealous of Ohjiro039s advances towards Misaki going so far as to try to attempt to play a quasimatch of Angelic Layer against Ohjiro despite the fact that he had never played it before. His family owns a karate dojo and Kotaro has practiced karate some himself showing Misaki some of his knowledge in hopes that Misaki can use it to help Hikaru win. from Wikipedia