Grimmjow is a tall, muscular man with light blue spiky hair and light blue eyes, green lines below them, similar to the eye markings on the Panthera genus of cats. His attire consists of a white hakama, a black sash, and a ragged white jacket with an upturned collar that he wears with the sleeves rolled up, leaving it open to expose his muscular chest. He possesses a feral cunning. He is blunt, sarcastic and quite sadistic, revealing a psychotic grin or laugh when he gets excited.