Kuro

Kuro

クロ
Age: 121
Hair: Black
Height: 1'10"
Weight: 9 lb
Blood type: AB

Kuro is a Cat Sídhe and Rin Okumura's familiar.

He was once the familiar of Shirou Fujimoto until his death at the hands of Satan.
(Source: Ao no Exorcist Wikia)