Esterk, known fully as Hadlar Esterk, is a fictional character from the anime series "Dragon Quest: Dai no Daibouken." Esterk is a formidable antagonist, serving as one of the main villains who threatens the peace of the world. A powerful and strategic warrior, he seeks to dominate through his cunning and strength. Esterk's character is driven by a deep-seated ambition for power and control, which often brings him into direct conflict with the series' protagonists. His complex motivations and formidable abilities make him a significant challenge for Dai and his companions.