Frieda Reiss

Frieda tended to be a good and caring person. She liked to walk and look after the peasants. She loved Historia to the point that she erased her memories in order to protect her. She possibly volunteered to become the next inheritor of the Founding Titan. She was brave, as she believed she would not give in to her ancestor's ghosts. She cried during the succession ceremony, as it meant she had to eat her uncle. After receiving the Founding Titan, her personality changed. Due to being a Reiss, she fell under the will of the First King. She suffered from depression and sometimes her behavior changed from her regular self to another that was much more aggressive. She also thought that humans were all sinners. However, she fought to the death against Grisha Yeager in order to protect her family. Kenny Ackerman, a Reiss bodyguard, said that Frieda talked about the same things Uri did, like peace and love, but it is unknown if she actually believed in this or if she was saying what was expected of her. From devouring her uncle, she also received the First King's opinions and thoughts about conflict. When Grisha Yeager arrived in the chapel, he begged her to end the invasion of the Titans, but she refused; this refusal would ultimately lead to her demise by Grisha's hands.

Human form
When Eren dreams of her, he first mistakes Frieda for Historia, highlighting the sisters' physical similarity. Frieda was tall and had long, smooth, dark hair; stopping well past her shoulders but she later cut it shoulder length before eating her uncle Uri and prior to her death her hair had grown back about half its original length. Frieda had a rounded face and was usually seen in simple dresses and skirts despite being a noble. After receiving the Founding Titan, Frieda's eyes would differentiate between light and a dark vacant, a sign she had inherited the memories of the world as well as the will of the First King.

Power of the Titans
Other than the regular abilities possessed by Titans and those with the power of the Titans, nothing especially notable was seen belonging to her Titan form as she was killed rather easily by Grisha's Titan form. * Founding Titan: Because of her royal blood, Frieda has the full abilities of the Founding Titan, but she was not experienced in using it. Using the Founding Titan, she was able to manipulate the memories of Subjects of Ymir, such as Historia Reiss. Rod calls this the "invincible power." * Regeneration: Like all Titans, she possessed healing abilities. When punched in the face by Grisha, she started emitting steam from her wounds.