Archanfel Gigantic Dark is a powerful antagonist in the anime and manga series 'Bio Booster Armor Guyver.' He is the leader of Chronos and the most powerful Zoalord, wielding immense psychic and physical abilities. In his Gigantic Dark form, Archanfel merges with the Gigantic armor, dramatically increasing his power and posing a major threat to the Guyver protagonists. His complex motivations and enigmatic nature make him one of the series' most formidable and memorable villains.