Kuro

Kuro

クロ
Age: Unknown (appears 18)
Birthday: December 31
Height: 177 cm (5'9.6)
Strength: 6/10, Tactics: 5/10, Cooperativeness: 2/10, Mental : 3/10, Appearance: 8/10, Soothing: 10/10
Contract item: Cat bell
Animal form: Cat

Kuro is a servant vampire or a servamp, who made a contract with Shirota Mahiru. He can turn into a cat in the daylight, and is the oldest brother of the seven vampire brothers.

(Source: Servamp Wikia)