Belial Atrocious is a powerful and infamous character in the Ultraman franchise, serving as one of the main antagonists. He is a corrupted Ultra Warrior who has embraced evil, gaining immense power and a fearsome new form known as 'Belial Atrocious.' As a recurring foe, Belial seeks to conquer the universe and defeat the Ultra Warriors, making him a significant threat throughout the series. His complex history and relentless ambition make him a memorable villain in the Ultraman universe.