Shirazu, like most of his teammates, is shown to have great respect for his mentor, Haise Sasaki. However, he is easily manipulated by Urie, and constantly seen accompanying him, the former squad leader, on dangerous assignments. Although he is a competent fighter with a ruthless nature, Urie describes Shirazu as a simple-minded person. This becomes evident when Urie easily manipulates him into thinking that Sasaki is using the Quinx for his own gain. He easily becomes fired up and speaks loudly. He also seems to be quite exaggerated in his expressions and movements. He is stated to be poor at tasks that require thought, such as academics or investigation.In contrast to his loud and violent mannerisms, he is also someone that cares greatly for his team. While prone to bickering with Urie, he shows a gentler side when interacting with Mutsuki or civilians Despite his habit of being easily influenced, he consistently demonstrates a strong admiration for Sasaki, of whom he shares a friendly relationship with.