|Chii by CLAMP|
|Series:||Chobits; Tsubasa RESERVoir CHRoNiCLE|
|Powers:||Acts as a barrier|
|First Appearance(Manga):||Ch.002 - The Price of Memory|
|First Appearance(Anime):||Tsubasa RESERVoir CHRoNiCLE - Episode 1 - "Destinies Converge"|
|Last Appearance(Anime):||Tsubasa RESERVoir CHRoNiCLE - Episode 32 - A Date with the Magician"|
Chii (ちぃ, Chyi) is a crossover character from Chobits and a minor character in Tsubasa: Reservoir Chronicles.
In the beginning of the series, Fai is shown with her in Celes sealing Ashura. He then transforms Chii into a barrier, guarding the pool where Ashura-ou and his late brother were kept. Fai could be in contact with her if Ashura wakes up. It was then revealed that Fai created Chii from one of Sakura's feathers that he had gotten hold of in the past. She eventually disintegrates after the feather is removed and given back to Sakura.
Being created by Fai, Chii stayed with him at all times in Celes, even when Ashura went berserk. After he was sealed, Fai asked Chii to look after Ashura as she did with his brother's body, until the day Ashura awoke, during the Infinity Arc, in which she communicated the awakening of the king to Fai several moments before.
When Syaoran and the group won the Human Chess Tournament, in the world of Infinity, they won an automata robot who looked like her (Fai confused them, though due to her clothing, she resembled more like Freya from Chobits, rather than Chii). Due to the interference created by the telepathic messages emitted by Chii and the interdimensional portal created by the automata, Sakura was split in two, her soul was drawn into the Dream World while her soulless body was taken to Celes.