Annie Leonhart is a graduate of the 104th Training Corps and former member of the Military Police Brigade. Her exceptional skills with swords and unarmed combat earned her the 4th rank, but she is also noted to be a lone wolf who struggles to work with others.
She possessed 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. In the year 845, she is sent on a mission to retrieve the Founding Titan, along with fellow Warriors Reiner Braun, Bertolt Hoover, and Marcel Galliard. As the Female Titan, she serves as a major antagonist prior to her defeat, at which point she crystallizes herself and is left in a comatose state. She was held underground in the custody of the Survey Corps for approximately four years before escaping during a battle between the Military, the Yeagerists, and the forces of Marley.
Annie is a young girl of considerably short height with a small yet very muscular build and physique. She has moderately short blonde hair that is often tied at the back with her right fringe mainly draping over the right side of her face (though she tends to push it to the side on occasion, possibly for better visibility); currently she wears it down and it falls slightly below her neck. She has an oval-shaped face, blue eyes, a Roman nose, and pale complexion. Her hair is particularly pale and, when untied, reaches down the nape of her neck. Her eyes, although of considerable size and proportion, often have a sullen vibe to their appearance. Annie's casual attire mainly consists of a hooded sweatshirt underneath a jacket accompanied by dark gray pants. She is often seen in the Training Corps uniform and then the Military Police Brigade uniform after graduation. Though Annie frequently dons hooded sweatshirts as part of her standard attire, she also wears her signature white hooded sweatshirt as part of her standard military attire. During risky missions, it is implied that she always wears her silver ring, which has a small folding blade, on her right index finger; she uses the blade as her primary means of causing self-injury to transform into her Female Titan form at any time.
Appearance: Annie is a young girl of considerably short height with a small yet very muscular build and physique. She has moderately short blonde hair that is often tied at the back with her right fringe mainly draping over the right side of her face (though she tends to push it to the side on occasion, possibly for better visibility); currently she wears it down and it falls slightly below her neck.
Personality: Due to her harsh upbringing, Annie has become an isolated, exclusionary person; friendships do not come to her easily. She is rarely seen smiling and often has an emotionless expression.
History: After Annie's birth, her blood test revealed she was a Subject of Ymir, which suggested her mother had an affair with an Eldian man. While it is unknown what happened to her mother, Annie was deported to an internment zone and later adopted by Leonhart who was relocated for similar reasons.
Annie Leonhart in the story: As the Warriors are camping for the night, a Pure Titan ambushes them and devours Marcel, who dies saving Reiner's life. After escaping from the Titan, Annie is able to find Reiner and angrily attacks him for his cowardice. She argues that they should retrieve the Jaw Titan's new wielder and return to Marley, but Reiner attempts to manipulate her into continuing the mission.
Source: Attack on Titan Wiki, available under CC BY-SA 3.0.