Grimmjow is a tall, muscular man with light blue spiky hair and light blue eyes, the latter including green lines below them, similar to the eye markings on the Panthera genus of cats. While appearing to be a laid-back individual, Grimmjow possesses a brutal, impulsive, and excessively violent personality alongside a lethally short temper. During the fight against the Vandenreich, Grimmjow seems to have mellowed out some, as he's less impulsive and reckless as he was previously.