She is introduced later in series, and is the right hand woman in Travas' team. She is talented with the gun, maybe even more so than Major Travas (Wilhelm).
Her father was Captain Grantz. Blaming himself for his death, Travas personally hired Ann so that she would have the closest position to exact her revenge, for which he did not plan on stopping. Ann was also shocked to know that Maj. Travas chose "duty" over his family.