Jiji

In the American version, Jiji is a chatty and sarcastic cat that likes to act proud whilst in the Japanese version, Jiji is a cautious and humble, and is always ready to help Kiki. The character of Jiji is significantly different in the American dub. In the Japanese version, Jiji is voiced by the female performer Rei Sakuma, while in the American version Jiji is performed by Phil Hartman, and also has more of a wisecracking demeanor. In Japanese culture, cats are usually depicted with feminine voices, whereas in American culture, their voices are more gender-specific. A number of Hartman's lines exist where Jiji simply says nothing in the original (such as in the scene where Jiji approaches Lily along the top of the wall). Jiji's personality is notably different between the two versions, showing a more cynical and sarcastic attitude in the 1998 English version, as opposed to cautious and conscience-like in the original Japanese.

Jiji is a black kitty cat with large white eyes and black pupils. The insides of his ears are iris purple. As a witch familiar, he has a much longer lifespan than normal cats.