Hadlar is a central antagonist in the anime series 'Dragon Quest: Dai no Daibouken'. Initially presented as a formidable Dark Lord, he serves as a major threat to the protagonist, Dai, and his companions. Hadlar is resurrected by the Great Demon King Vearn and leads the Dark Army in a bid to conquer the world. As the series progresses, he evolves from a menacing enemy to a complex character with his own code of honor and personal struggles, ultimately playing a crucial role in the narrative's development.