Kadode is Ouran‘s best friend. They have been friends since elementary school.
Ooba Keita is Ouran's friend. Ouran is deeply impressed by his ability to play video games and has a interest in the invader technology he owns. Eventually they grow close.
Kiho is Ouran’s friend.
Ai is Ouran’s friend.
Rin is Ouran’s friend.
Nakagawa Hiroshi is Ouran's older brother. He is very supportive and cares deeply about her. He even states that he became a neet so she can have a place to go back to when needed.
Mr. Nakagawa is Ouran’s father. He is deeply worried about her future.
Mrs. Nakagawa is Ouran's mother.