Dorako was one of three monsters who was attracted to the effects of the comet Tsuifon that was passing through Earth's atmosphere. He is first encountered by the Science Patrol as he gives chase to them to attack until the Science Patrol tricked him into fighting another one of the monsters who was awakened, a Yeti-like monster called Guigass. Dorako and Guigass fought to a standstill, with both of them evenly matched until the third monster awakened: Red King.

After Dorako ambushed Red King from behind, Red King briefly sided with Guigass and attacked Dorako, tearing off his wings and beating the monster down. Eventually, Dorako succumbed to his injuries and died, leaving Red King and Guigass to fight each other instead.