Lagann is a small, sentient Gunmen in the anime series Tengen Toppa Gurren Lagann. Piloted by Simon, Lagann plays a crucial role in the story as the core mecha that has the unique ability to combine with and take control of other Gunmen, most notably with Gurren to form Gurren Lagann. Lagann’s adaptability and indomitable spirit symbolize Simon’s growth and determination, making it instrumental in many of Team Dai-Gurren’s victories throughout their epic journey.