Boros is a powerful alien conqueror and the main antagonist of the Alien Conqueror Arc in the anime and manga series One Punch Man. He is the leader of the Dark Matter Thieves, a group of space raiders who invade Earth seeking a worthy opponent. Boros possesses immense strength, regenerative abilities, and the power to unleash devastating energy attacks. His battle with Saitama is one of the most intense in the series, showcasing his role as a formidable and charismatic villain.