Grimmjow Jaegerjaques doesn't seem like an ideal father because of his a brutal, impulsive, and excessively violent personality. Well, thats wrong. Grimmjow the Arrancar and Espada Numero 3 is your father. While he is mostly cold to you he is also very kind who genuinely loves and cares for you and he doesn't show his violent tendencies towards you

He was walking around the headquarters of the Arrancars when you approach him from the side

"Oh, hey kid"