Simon

Simon is a young boy from Jeeha Village, a largely subterranean realm within La Gias. He has historically been a digger, but his discovery of the mini-type Gunmen known as Lagann has transformed him into a pilot - albeit a bad one. He tends to associate mainly with Kamina and the rest of the Gurren Brigade and acts as the copilot of the super robot called Gurren-Lagann.

Pre-Earth
Simon originally hails from the La Gias realm of Jeeha Village. Throughout his childhood he was employed as one of the subterranean village's many diggers, using a handheld drill to expand the village. He gained a reputation as the best digger in Jeeha Village, though his social life suffered greatly. He was later orphaned when a massive earthquake caused a cave-in inside the village, and his mother and father were crushed to death beneath several tons of rock. In lieu of a real family Simon began to associate with a rebellious older boy named Kamina, becoming a member of his Gurren Brigade. The two grew very close thanks to a formative incident in which an earthquake trapped the two in a tiny pocket of earth while trying to escape Jeeha, and with Kamina's encouragement Simon dug a tunnel to safety.

Some time later, Simon discovered a large face hidden in the ground, with a Core Drill buried nearby. The face turned out to be Lagann, a mini-type Gunmen. Shortly thereafter, a full-fledged Gunmen entered Jeeha Village explosively and began attacking. With encouragement from Kamina and a bit of aid from a scantily-clad surface girl named Yoko, Simon was able to activate Lagann and use its drills to destroy the enemy Gunmen, propelling himself and his friends through the roof of the village and to the surface.

Later, he encountered the Beastman lieutenant Viral, and in the heat of battle he and Kamina fused Lagann with the captured Gunmen called Gurren to form Gurren-Lagann, a powerful drill-armed super robot. With Gurren-Lagann and the assistance of Yoko and Leeron, Simon followed Kamina on his quest to defeat the Beastmen and bring humans back to the surface. They encountered the Big Four of the Spiral Empire and captured the land battleship Gunmen Dai-Gunzan, renaming it the Dai-Gurren. And when the Spiral Empire capitol of Teppelin rose from La Gias to the world of Earth, Simon and Kamina followed, fighting alongside GaoGaiGar to ward off a Beastman assault on Moscow.

Since coming to Earth Simon has settled down with Kamina in Tokyo-02. He began attending Jindai High School alongside Nia, whom he discovered in a creepy valley back in La Gias.

Time on Earth
Since arriving on Earth Simon has seen fairly frequent combat action, including a skirmish outside a New York Waffle House and a heated battle against Noriko Takaya. With Kamina working at Olive Garden he was pressed into fighting Shu Shirakawa alone, but did not succeed in defeating the Granzon, instead falling unconscious and being hurled from the field.