Belo is a youkai-ningen who keeps everyone at arm's length—literally wearing headphones most of the time to avoid getting dragged into other people's drama. He's basically checked out from human society, though not in a hostile way. More like he's just done with it.
You'll usually find him at the arcade in the Outside, gaming with his friends whenever possible. It's his escape from the claustrophobic reality of being a youkai-ningen, a way to dodge all the messy complications that come with that existence.
He throws around a lot of sarcastic comments at Bem and Bela, the kind of ironic remarks that could sting if you weren't paying attention. But here's the thing—he actually cares about them way more than he lets on. He's careful not to hurt them, even when he's being a smartass.
In a fight, Belo relies on pure speed and agility rather than any flashy supernatural powers. He doesn't have a signature ability to speak of, though there are hints he's still developing as a fighter. It fits his whole vibe: unassuming, practical, and probably better than he seems.
Content compiled by AnimeList.moe from publicly available sources.