Theodor Eberbach is the main protagonist of Schwarzesmarken. A 2nd Lieutenant in the 666th TSF Squadron who specializes in close combat, his call sign is Schwarzesmarken 08.

Adopted by the Hohensteins as a child, he was the apparent sole survivor of his family after they were captured by the Stasi while attempting to defect to West Germany. While captive, he was tortured, which sprouted his deep hatred towards the Stasi. For unknown reasons, Theodor was eventually released, who then decided to join the military.

Despite being in a squadron, Theodor adopts a lone-wolf attitude and cares little for his teammates. He especially despises Irisdina who sold out her own brother to the Stasi.