Simon Jiha is the main protagonist of the anime series Tengen Toppa Gurren Lagann. Initially a shy and unassuming young digger in an underground village, Simon's life changes dramatically after discovering the small, powerful Gunmen named Lagann. Encouraged by his bold and charismatic friend Kamina, Simon rises to the challenge of leading a rebellion against the oppressive Beastmen who rule the surface. Throughout the series, Simon matures into a confident and determined leader, embodying the theme of perseverance and the power of the human spirit. His growth and bravery inspire those around him, making him a pivotal character in the series.