Grimmjow is Espada number six. Grimmjow appears to be a laid-back and irreverent individual at first glance, but this scruffy exterior hides a brutal, impulsive, excessively-violent personality and a lethally-short temper. Grimmjow is blunt, sarcastic, and quite sadistic, revealing a psychotic grin whenever he becomes excited, much like Kenpachi Zaraki or Hollow Ichigo. He displays little respect for authority and says whatever is on his mind, regardless of whether or not it is appropriate. Before Grimmjow became an Arrancar, he was a panther-like Adjuchas-class Menos.