Ultraman Tregear (ウルトラマントレギア, Urutoraman Toregia) is an Ultraman who made his first appearance in Ultraman R/B The Movie as the main antagonist. He later becomes the main antagonist of the succeeding series, Ultraman Taiga. He was once Ultraman Taro's friend and a scientist on the Land of Light who created the Taiga Spark, but several disappointments and obstacles drove him down a dark path.