Kyojuro Rengoku was a tall, lean young man with long bright yellow hair streaked with red, black eyebrows, and golden eyes. He was known for his charismatic personality and enthusiastic smile. He wore a modified Demon Slayer uniform, including a brown gakuran jacket, white belt, hakama pants, and a distinctive flame-patterned haori. A skilled swordsman, Kyojuro rose through the ranks of the Demon Slayer Corps, eventually becoming a Hashira. His strength and skill were evident in his victories against various demons.