One of the Guylos Empire's greatest Zoid pilots. Schubaltz is an honorable fighter, and wishes to see peace between the Republic and Empire as opposed to total destruction of both sides. He has a younger brother, Thomas, who doesn't appear until Guardian Force. He both loathes and distrusts Prozen, though he doesn't do anything to stop him. Initially a major, he is later promoted to the rank of colonel. Karl Schubaltz pilots the Dark Horn and the Iron Kong, as well as a custom Saber Tiger.