Aoi Kyogoku

Aoi is a computer genius who is quite the prankster. He has a very interesting sense of humor which gives the manga a comical touch. After one attempt, for instance, he traps Koki and Tanpopo in an elevator at their school. He is good hearted, however, and becomes close friends with Tanpopo and Koki. Also, Aoi's mother is the architect that designed Meio High School. He is nick named "Flippy" by Tanpopo as he tends to flip out a lot. He's also a bit loose in the head at times. He is nicknamed "Kireta," which is equivalent to Mr Psycho, after the incident with the elevator and the toy gun. (Source: Wikipedia)