Name: Oumura Yumi
Race: Human
A cute high school student working at the same bar as Hideki. She is affectionate towards him. She seem to have a sad past involving a persocon. Whenever the subject is raised, she will feel pretty upset, especially when Hideki mentions about Chii. However, I feel that she had something going on between her and Hiroyasu Ueda.

Name: Hiroyasu Ueda
Race: Human
Hideki used to work for him at his cake shop. This guy is actually 39 years old! But he doesn't look his age because of his baby face. He was married to a persocon. However, tradegy struck when his wife malfunctioned and got seriously damaged when she *saved him from an oncoming vehicle.
*Picture and rough translation edited by me

Name: Hibiya Chitose
Race: Human
Hideki's landlady, a very attractive widow. She's the one who provided Chii some clothing, and a very special one, which she claims that it originally belongs to Chii. She seems to know something about Chii's past. A very mysterious person, I guess.

Name: Dita and Ziemma
Race: Persocons
Dita (bottom) and her guy companion, Ziemma, seem to be after Chii. Their motives are still relatively unknown. They know the person who created Chobits, unfortunately the creator is already dead.

Name: Shimizi Takako
Race: Human
A married prep school teacher, but is neglected by her husband because he is too engrossed by his persocon. She originally wanted to be an elementary school teacher. There's something going on between her and Shinbo, but I shall not elaborate on it (buy the manga~!!) =p

Name: Yoshiyuki Kojima
Race: Human
A guy who is interested in Chobits, and kidnapped Chii (in Book 4). He got to know about her after seeing her details posted on the internet. I still do not know his motive. He has a notebook persocon named Kotoko.