Here are the strongest non-human characters in anime! However ... see this unimaginably powerful Ability in the movie Bungou ...

Fryodor Dostoyevsky is the smartest villain in Bungou Stray Dogs, a series teeming with some of the most intelligent characters in anime. Fryodor is known for his ability to come up with plans.

Not long after Ougai Mori takes the reins of the Port Mafia, his right-hand man, Osamu Dazai, has a nasty run-in with a gravity manipulator named Chuuya Nakahara, leader of the Sheep gang.