Lagann

Lagann is Simon's personal Gunman and one of the components of Gurren Lagann (Gunmen) along with Gurren.

History
Lagann is a Gunman found by Simon in the first episode while digging tunnels in his village. It received its name, Lagann (羅顔), meaning "enveloping face", from Kamina and draws power from the Core Drill, a small golden drill Simon uses similar to an ignition key. In Gurren Lagann Parallel Works episode 8, it's revealed that the first Laganns were found by Lordgenome as a child during the Anti-Spirals' initial assault on Earth long before the series' story begins and as such were used as a basis in the creation of all Gunmen that appear in the show to use against their enemies. However, after Lordgenome's betrayal he seemingly destroyed all of them except for the one that was placed deep underground until Simon finds it.

Powers and Abilities

 * Lagann Impact: Lagann impacts the opponent with its drills which is usually incorporated with its signature assimilating abilities.
 * Gunman Fusionism: Lagann has the power to assimilate/take over other Gunmen that it drills into. The prime example is drilling into Gurren to make Gurren Lagann, but it does work on other machines such as Dai-Gunzan. Like Lagann's other powers, this is tied to the pilot's willpower.

Trivia

 * In the second movie it is implied that Lagann has its own sentience, when after the Anti-Spiral demolishes it it grabs Simon and throws him. Simon himself is surprised by this and yells out "Lagann!?" afterwards meaning he didn't tell it to do so.
 * If it is not actually sentient, it is theorized that the spirit of Kamina was the one that possesses Lagann for a brief amount of time.
 * In both the TV series and the second movie, the crew of Super Galaxy Dai-Gurren find numerous Laganns deep within the Galactic Spiral Abyss. These Laganns are then used as the cockpits of Tengen Toppa Gurren Lagann as well as the other Tengen Toppa Gunmen. After the Anti-Spiral universe is destroyed and all of the Spiral Power maintaining the Tengen Toppa mecha vanishes, the pilots are still inside their Lagann cockpits.
 * Lordgenome possesses a different type of Lagann, which acts as the head of the Lazengann. It is black, it has a slightly different face, and its canopy is a simple red force field, rather than the typical brain-pattern canopy.
 * In the final charge against the Anti-Spiral race, Lagann is seen having the same spiral eyes as Kittan and Lordgenome.
 * "Lagan" in English is a term for goods which have been lost to the bottom of the sea, but are recoverable. This can refer to how Simon and Kamina discovered Lagann deep within the desert.