Hamidento (ハミデント Hamidento), nicknamed Hamī (ハミー) by most, is a cute little robot under the care of Billy. He doesn't acknowledge Billy as a parent at all, and while he pretends to be cute and loveable around him, a mean side of him comes out when Billy's not around. He smokes and sometimes acts like a teenage delinquent, and has everyone he knows ranked in order of respect. Jaguar is inexplicably high on the list, Hammer is always on the bottom. He also has amazing fighting power. Hamii is the series' mascot. He is voiced by Yūji Ueda in the Drama CDs and OVAs.