Duke Fleed, also known as Daisuke Umon, is the main protagonist of the anime series Mazinger Z. He is the prince of the planet Fleed and is known for his bravery and leadership skills. Duke Fleed pilots the powerful robot Grendizer to protect Earth from various alien threats, particularly the Vegans, who seek to conquer the planet. As a character, Duke Fleed embodies the classic hero archetype, fighting for justice and the safety of humanity. His backstory includes a tragic past, having fled his home planet to escape the destruction caused by the Vegans. Throughout the series, he showcases his determination and compassion, making him a beloved figure in the world of anime.