Read more about Chii at: Wikipedia

Official Site: CLAMP

is a fictional character in the manga series Chobits, and its anime adaptation. She is a Chobit, a type of persocom that is far more technologically advanced than regular persocoms, and who are said to possess true machine intelligence rather than relying on the execution of pre-loaded software programs like other persocoms.

The name "Chobits" comes from the fact that her creator, Ichiro Mihara, used the word "Chobi" to describe anything he thought was "small and hopelessly adorable". Two Chobi (Chi and her sister Freya) become "Chobits".

Chi is also a crossover character in the series Tsubasa: Reservoir Chronicle and Kobato.

She is found by Hideki one night in a pile of trash as he makes his way home from work. He takes her to his apartment and tries to figure out how to activate her. A typical persocom (abbreviated from "personal computer") has its power switch in or behind its ears, but Chi's is located in a very unorthodox place: her vagina. Realizing this, Hideki overcomes his moral objections and manages to activate her. She has difficulty communicating with him at first; the only word that she is able to say being "chi", but slowly she learns how to speak. She is initially fearful that Hideki will discard her because of this, but he reassures her that he would never throw her away. When Hideki decides to give her a name, he remembers the only word that she can say and decides to call her "Chii".

Chii has not been a contender in any CBUB matches.