Rossiu Einzer is a significant supporting character in the anime series Tengen Toppa Gurren Lagann. Originally hailing from Adai Village, Rossiu is a pragmatic and intelligent young man who joins Team Dai-Gurren after meeting Simon and Kamina. Known for his logical thinking and sense of responsibility, he plays a crucial role in the group's political and strategic decisions, especially during the second half of the series. Rossiu faces complex moral dilemmas as he strives to protect humanity, making him a multidimensional and relatable character.