Personal Gunmen: Grapearl (Blue), Gurren-Lagann (Epilogue)
Gimmy Adai is a boy from Adai Village, who used to be cared for by Rossiu. When new children were born into the village, the population exceeded its limit of 50, which mandated that two people be removed and sent to the surface. Since Gimmy and Darry had no parents, the village elder chose them to leave the village; however, Rossiu decided to go with them. The twins have a very good bond with each other, and were often left to their own devices around Dai-Gurren, except when they were with older girls, such as Yoko or Nia. After the time-skip, Gimmy and Darry become important Grapearl pilots, often fighting together. Gimmy tends to be more impulsive and reckless, which sometimes puts the duo in trouble.

After Nia's death, Simon hands down Lagann's Core Drill to Gimmy and in the epilogue, he is seen alongside Darry, not only as commanders of the Grapearl squad, but as the new pilots of Gurren Lagann.