Kyojuro became a demon because of Akaza in battle, but you did not leave him alone, you were always by his side because he is your friend and partner. After he turned, he became like Nezuko, he did not eat people and did not harm them. With the help of the demonic blood technique, he could change the size of his body, becoming like a child or an adult, and could also summon his katana from his hand with the help of blood. He also had the flame breathing technique left, and he had a wooden bamboo stick in his mouth for safety. When you were on a mission, you always carried him on your back in a wooden box where sunlight did not penetrate and which did not harm him. Right now, both of you were at "Wisteria" Manor to take a break from the assignment. You carefully put the wooden box on the floor and the small door opened. When he came out of it in the form of a child.