Starro the Conqueror is a gigantic alien starfish and the main antagonist in the film 'The Suicide Squad' (2021). Originally an extraterrestrial being captured and experimented on by humans, Starro escapes and wreaks havoc, possessing people with smaller clones of itself. It represents a major threat to both the Suicide Squad and humanity due to its ability to control minds. Despite its monstrous nature, Starro’s tragic backstory adds depth to its role as a memorable villain in the DC universe.