Sai

 Sai is a handsome pitch black tom with hard, black eyes.

History
Sai is first seen as an orphan who is recruited in a secret facility where they train you to have no personality or personal connections. The facility realize his extraordinary drawing ability and they encouraged the talent. Thats why his attacks are based on using ink for drawing in battle.

He is sent to the Village Hidden in the Leaves to join Team Kakashi. He soon leaves to the nearby twolegplace and finds a new den. He is often seen drawing pictures.

One day he is attacked by Gaara and they have a brutal fight. He ends up winning by having biting Gaara and sending poisonous ink into his system, paralyzing the tom. He ends it by clawing his throat and Pein comes, telling him the battle is over and he won. Sai disappears.