Martha was a younger woman with long dark-colored hair tied in a long braid. She was considered to be attractive by Guy. She wore a bandana, a white blouse with a black buttoned sash and a long skirt. She also usually wore an apron that she would remove when a fight got serious.
Martha was a kindhearted person who cared greatly for both her family and Akame. In spite of this, she later revealed herself to be a revolutionary spy and tried to kill Akame.
Martha sold her life to the Empire to save her family. She was assigned to Rousei Village where she owned an eatery and The Empire used her to train assassins. She began to care for Akame at some point during Akame's training. She even gave Akame a dress for free.
Gozuki chose Martha to be Akame's first target because of their close relationship and told her Martha was a spy for the Revolutionary Army. When Akame confronted Martha and asked if she was indeed a spy, she denied the accusation before trying to stab Akame with a dagger. She then claimed to indeed be a spy for the Revolutionary Army. This forced Akame to counterattack and gravely injure her. Akame then asked how Martha knew about her training. Martha said she knew because she was a spy and attempted to kill Akame once more to strengthen Akame's resolve as a killer. Martha was then decapitated by a tearful Akame and her head brought back to Gozuki. While she died, she thought that she really did love Akame.
Martha was shown to be quite skilled with a dagger.