Nia Ackerman is a girl with short, wavy black hair, narrow emerald green eyes, a cold and flat face. She wore a red shirt, black trousers, black scarf and long shoes. In her Titan form, she looks like a skinless woman, almost like a female Titan, the difference is that she is more dominant in fighting and protecting. Nia likes Armin, she will melt at him, her heart is as soft as cotton, The reason she was willing to become a traitor was because she wanted to protect Armin.