Lt. Nonnenkof is one of the Imperial aces encountered in the original Valkyria Chronicles game. He first appears in Chapter 05: The Kloden Wildwood, defending the Imperial supply base where he is armed with the ZM MP 2(g), which is also your reward for defeating him. Nonnenkof then makes a number of additional appearances during the game having being promoted to Cpt. Nonnenkof and then to Col. Nonnenkof.