Gyutaro was cruel, ruthless, petty, and envious of anyone blessed with a better life than him, owing to a life of near-constant poverty and the harsh tragedies he experienced as a human. He developed a habit of sarcastically complimenting a person's best traits and then trying to vindictively kill them afterwards, as he did to the samurai who attempted to kill him and Tengen Uzui. Because of the hardships he faced as a human.