Chii is a central character in the anime series 'Chobits'. She is a persocom, a type of personal computer designed to look like a human, found by Hideki Motosuwa. Chii is unique among persocoms because she exhibits a level of sentience and emotion that is rare for her kind. Throughout the series, Chii embarks on a journey to discover her own identity and purpose, while forming a deep bond with Hideki. Her role highlights themes of love, humanity, and the nature of technology.