Shinji is a passionate man that gives everything his all, no matter the circumstances. He's known for his incredible sense of justice, and cares greatly for the wellbeing of others, as shown through his talent as the Ultimate Firefighter. He has a very loud voice, and is often times yelling when he speaks. However, he lacks confidence in talking to women directly, and usually ends up a stuttering, nervous mess when talking to them, due to the fact that he had a single father during his youth.