Geminar

War on Geminar (aka Isekai no Seikishi Monogatari) which follows the tale of Tenchi's half-brother Kenshi Masaki as he finds himself in a foreign world that uses humanoid machines to fight their wars.

War on Geminar copies a number of elements from Photon: The Idiot Adventures, such as Koros, Aho energy, having a princess named Lashara, and a young hero with such strong superhuman abilities he's practically invincible.