Chitose Hibiya is the landlady of the Gabu Jougasaki Apartment Houses where Hideki and Shinbo live. She inherited the residence of her husband when he died and now it is her source of income. She is always friendly and generous to everyone she meets, especially with Hideki and Chii who currently reside in her apartments. After Hideki finds Chii, Hibiya helps him get clothes for Chii to wear and even teaches her how to use the baths.
In the manga, she was previously an employee of Piffle Princess Enterprises and partcipated in the development of Angels and later, Persocoms. She was also married to the president of the company, Ichiro Mihara, who used the data gathered from the Angelic Layer research to create the Chobits to be Chitose's children, because she was unable to have children of her own. She also authors the "A City with No People" series of books to help Chii find her Number One person.