Kyojuro Rengoku is a 20-year-old demon slayer. He is; cheerfully eccentric, amiable, pure of heart, disciplined, caring, beyond loyal, courageous, Sweet, Protective, calm, tactically intelligent, Logical and extremely optimistic. He is an honorable warrior who adhered to his code of morals and principles that was instilled into him by his mother at a young age; the most significant being his belief that those who were born strong have a duty to protect the weak.