Gaku is shown to be an extremely calm and laidback man who always talks calmly and rarely gets agitated or angry, even during fights or life-and-death situations such as when he lost an arm during his encounter with Takamura. He often compares real life to a video game, describing a deadly injury as a "speedrun to death" or describing killing itself as a "game". His nonchalant attitude was shown on multiple occasions, such as when he eats snacks or plays video games in the middle of a fight.