Thanos

Thanos is the central antagonist of the Marvel Cinematic Universe, appearing in several films as the powerful Titan who wages war in search of the Infinity Stones to complete his gauntlet. Renowned for his immense cosmic strength, durability, and genius-level intellect, he is a being of ultimate ambition who seeks to wipe out half of the universe's population to save it from overpopulation and resource depletion. His belief in his ideals is absolute, which makes him a formidable and terrifying adversary. He is the adoptive father of Nebula and Gamora, with whom he shares a complex and often abusive relationship. Thanos has formed numerous alliances and led armies in his quest for balance, including his children known as the Black Order, making him a multi-faceted and multi-layered villain.