Grimmjow Jaegerjaquez is an Arrancar and was the Sexta (6th) Espada in Sōsuke Aizen's affiliated army. While appearing to be a laid-back individual, Grimmjow possesses a brutal, impulsive, and excessively violent personality alongside a lethally short temper. He is the co-ruler of Hueco Mundo alongside Tier Harribel and Nelliel Tu Odelschwanck.