Simon Lagann is the main protagonist of the anime series Tengen Toppa Gurren Lagann. Initially a timid and insecure boy living underground, Simon grows through adversity and the encouragement of his friends, especially Kamina. He becomes the pilot of the powerful mecha Lagann and eventually leads humanity in a battle against oppressive forces. Simon’s journey from self-doubt to heroic leader is central to the series' themes of perseverance, evolution, and hope.