Masaru is an elementary school-aged boy, around 12-years-old. He is tan-skinned and covered in small bruises and cuts. He has red hair, bushy eyebrows, and blue eyes with a flame pattern iris. He sports white headphones and wears a white tank top that has the emblem of the "Hero" class and the silver Warriors of Hope badge on the front, and a big number 10 on the back. Underneath, he wears a red and black striped shirt that matches both his armband and socks, blue shorts.