Bellion

Bellion is a powerful Demon Clan member and the leader of the Six Knights of Black, appearing as the main antagonist in the anime film The Seven Deadly Sins the Movie: Prisoners of the Sky (2018).

In the anime version, he's depicted as a very tall, muscular demon with gray skin, red eyes, and white hair (distinct from his purple hair in the manga). He has a red ring-like mark on his chin and exudes arrogance and confidence in his strength.

Bellion harbors a grudge against Meliodas for being passed over for membership in the Ten Commandments long ago. He's brash, prideful, and ruthless, willing to sacrifice his own allies' souls to unleash the monstrous Indura for greater power and to pursue his ambition of ruling the Demon Clan. He engages in intense battles against Meliodas and the other Sins, showcasing impressive combat abilities, including manipulating severed limbs and gaining power boosts from dark forces.

Overall, he's a formidable, vengeful villain exclusive to this movie storyline in the anime adaptation.