Kuro Kagami is the cat girl in the lolicon anime/manga series "Kodomo no Jikan".

Kuro is the real name of the main character in the anime series Black Jack. Kuro also means black in Japanese.

黒 (KURO) is also the name of the black cat in 'Ao no Exorcist' or 'Blue Exorcist' (manga/anime),

Kuro Yatogami is a sword wielding samurai-like character in the anime K. He tries several times to kill the main character but I can't help but love the name and the character associated with it.