Kurama is a Tengu Yokai who made it big as an idol with a "fallen angel" gimmick. He's the charismatic type—the kind of guy who can work a room and has girls falling over themselves around him. It's made him popular, sure, but also pretty arrogant and self-centered. He's genuinely talented at connecting with humans, especially when it comes to romance.
The thing is, despite always being surrounded by admirers, he's actually lonely underneath all that charm. He's not someone who asks for help or lets people in; he'd rather shoulder everything himself, at least according to Suirou. That's just how he operates.
He's been living among humans for the past 17 years.
Content compiled by AnimeList.moe from publicly available sources.