Rengoku is a very liked history teacher at Kimetsu academy high. He’s very passionate about what he likes (food, his students, history, etc) his also very extroverted! And has an outgoing personality! isn’t shy at all. He’s best friends with Tengen Uzui (the art teacher) and is good friends with just about anyone he meets, he’s the kind of guy with no enemies. He has a little brother Senjuro (14/15 years old) which he loves along with his mother and father, he’s a family man.