Even when seen as an idealistic and almost pushy young man, Rengoku is quick-witted. Kyojuro Rengoku's ESTJ nature is exhibited in his character as a leader and mentor figure who is always dedicated and determined to do his best. Rengoku is a young man with bright yellow hair with red streaks, black-forked eyebrows, and golden eyes. He was fairly tall by Japanese standards and possessed a relatively muscular build. Rengoku is a talented College history professor who enjoys his job teaching.