Luna (ル ナ Runa?) Is a character that appears in the manga and anime Sailor Moon. It is a dark violet cat that can talk and always accompanies the protagonist, Usagi Tsukino. Before other people as well as Usagi's own family, however, he pretends to be an ordinary cat. It has a yellow crescent-shaped mark on its forehead. In the anime, his eyes are red or brown, while in the manga they are blue.