She later joined the Military Police Brigade. Her exceptional skill with swords and unarmed combat earned her the 4th rank, but she is noted to be a lone wolf that struggles to work with others. She possesses the ability to transform into a Titan known as the Female Titan. Trained from an early age by her father ,  she is selected as one of Marley's Warriors. As the Female Titan, she serves as a major antagonist prior to her defeat, in which she crystallizes herself and is left in a comatose state.