Chii is a character that shows up starting as a minor character but quickly takes a role as part of the main cast. Akio sometimes jokes as her being the "Female version of Yume" for her constant up-beat, eccentric personality. However, Chii has a hot temper and is quick to get aggressive. She is also very excitable. Akio often makes fun of her for being short and looking very child-like. They are always going at each other but have an unspoken friendship. For the first part of the series she has a crush on Yume but later develops feelings for Akio.