|Japanese Name||天空橋 愛佳|
|Relatives||Kimito Kagurazaka (Classmate)|
|Manga Debut||Chapter 1|
|Anime Debut||Episode 2|
Aika Tenkuubashi (天空橋 愛佳 Tenkubashi Aika) is a classmate of Kimito when he comes to Seikain Jogakkou. She is a loner who has great trouble socializing with the other girls in the academy.
Aika has pale brown hair pulled up with two red bows. Her eyes are the same as hair. She wears long-sleeved school uniform that reaches past her stomach.
Aika is childish, naive, and shy about talking to others. This distances her from them even though she wishes to be popular among her peers. Aika is strongly fascinated of the outside world. PSP, ramen, and manga are but a few of her interests. She asks Kimito to teach her how to be a commoner. Aika declares the establishment of the Commoner Club with Kimito as the master. She seems to have feelings for Kimito beyond that of master and disciple. However, it is shown in a flashback to her childhood that a young boy (Kimito) once helped her escape to see the wonderful things the outside world had to offer.