Ulquiorra

A slender and rather muscular Arrancar of average height and melancholic appearance. He has unkempt, medium-length black hair, pale white skin, a black upper lip, very tasty eyebrows, and green eyes with a slit pupil like a cat. Part of his bangs falls between his eyes.

very cold, callous, dispassionate, or even standing aloof, brooding and indifferent, ready to harm both his comrades and enemies in order to achieve his goal.