Deja Ultraman, the protagonist of the Japanese drama "Deja Ultraman" and its derivative works, is also the first Ultraman with the ability of morphological transformation. Unlike other Ultramans, Ultraman Degas was a giant that had already appeared in the ultra-ancient period of the earth, not the native Ultraman of the earth. He was originally a dark giant that existed in the super-ancient period of the earth, and he was also the leader of the dark giants. Later, under the persuasion of the captain of the earth guard team in the super-ancient period of the earth, he abandoned the dark giants who were originally companions, absorbed the power of the three companions, sealed them, and finally became the giant of light.