Prison guard (Engines of War)

A guard was on duty in the prison that the War Doctor and Cinder were imprisoned in by Rassilon, as they tried to escape.

After running into her, the Doctor tried to reason with her to get past, but Cinder knocked her out with a punch to the jaw and they left her sitting up against the wall, before moving on to find the Doctor's TARDIS. (PROSE: Engines of War)