Dai is the main protagonist of the series 'Dragon Quest: Dai no Daibouken'. Raised on the island of Dermline by monsters, Dai dreams of becoming a hero like the legendary Avan. With a strong sense of justice and courage, he embarks on a journey to save the world from the threat of the Dark Lord Hadlar. Throughout the series, Dai discovers his hidden powers, strengthens his friendships, and learns about his true heritage as the son of the Dragon Knight, Baran. His character growth and battles against evil are central to the story.