List of Reborn! antagonists - Wikipedia

Katekyou Hitman Reborn! (Reborn!)

Byakuran, VS Battles Wiki

Skolas, Kell of Kells - Destinypedia, the Destiny wiki

List of Saiyuki characters - Wikipedia

Reborn Rich - Wikipedia

Ganon - Zelda Dungeon Wiki, a The Legend of Zelda wiki

List of Guilty Crown characters - Wikipedia

Reborn!: Reborn! characters, Reborn! episode lists, List of Reborn! chapters, List of Reborn! characters, List of Reborn! antagonists

I'm looking through comments on a post and saw people calling Tensura a generic isekai so this is towards those comments,not the entire sub : r/TenseiSlime

List of Reborn! characters - Wikipedia