In conclusion, Kyojuro Rengoku is a complex and well-developed character who plays a pivotal role in the Demon Slayer series. His unwavering dedication to his duty as a Hashira, his compassionate and empathetic nature towards others, and his determination to protect humanity from demons are some of his defining traits. spirited, dedicated, and honorable. long, bright yellow hair with fiery red streaks, black forked eyebrows, and golden eyes that transitioned to a red hue with white pupils.