Ultraman Belial is a major antagonist in the Ultra Series, primarily appearing in 'Daikaiju Battle: Ultra Ginga Densetsu.' Once a respected Ultra Warrior from the Land of Light, Belial fell from grace after succumbing to the power of the Alien Rayblood, becoming the first evil Ultraman. Driven by jealousy and ambition, he seeks to conquer the universe and defeat his former comrades. His dark presence and immense power make him one of the most formidable and iconic villains in the franchise.