He's best known for coming from a political family—his father's a politician—which shaped a lot of who he is. Growing up in that kind of strict household made him calm, well-mannered, and genuinely hardworking, but he's not some uptight rule-follower. He actually doesn't care much about what's "supposed to happen" and makes his own calls based on what he actually wants to do, prejudices and conventions be damned.
The guy's weirdly accomplished too. He can play violin and piano, knows horse riding, and has trained in Japanese Tea Ceremony—all that polished stuff you'd expect from someone with his background. That said, he keeps his idol career completely under wraps from his parents. They have no idea, and he's keeping it that way.
Content compiled by AnimeList.moe from publicly available sources.