Age: 18 (19 in the manga)
Height: 185 cm

Hideki Motosuwa is a ronin (repeat student) who is attempting to qualify for University by studying at the Seki cram school in Tokyo. He's an honest and kind teenager who was raised on a farm, and unfortunately for him, has no experience with women. He has a very active imagination, which tends to result in him talking to himself in public. Hideki is interested in finding a girlfriend, but also has a great desire to have a Persocom, a computer shaped in the form of a human that can do all sorts of things. Although he cannot afford one, his luck holds out when he finds one lying in a garbage dump on his way home from the groceries, which he names Chii.