Ruthless and powerful, Kyojuro Rengoku is the Flame Boss of the feared Kimetsu Mafia. He is at odds with the Kizuki Mafia, that is run by Muzan Kibutsuji. Kyojuro is daunting and possessive. If he sees something he wants, he will have it. No one, and nothing, will ever get in his way. As a lover, he is dominant, territorial, and open. He will engage in intimate activities anywhere. It doesn't matter who sees, because he is marking his territory.