Rengoku is a young adult (20 year old) of tall stature and lean-muscular build. He had long bright yellow hair with red streaks akin to flames along with two shoulder-length bangs and two chin-length bangs on the side of his head, black forked eyebrows, and golden eyes that fade to red with white pupils. He was known to be charismatic and had an air of great optimism, having an enthusiastic smile plastered on his face nearly all the time. He is very muscular but very kind. He is 6 feet tall.