Several hundred years ago, humans were nearly exterminated by Titans. Titans are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest Titans. Flash forward to the present and the city has not seen a Titan in over 100 years. Teenage boy Eren and his foster sister Mikasa witness something horrific as the city walls are destroyed by a Colossal Titan that appears out of thin air. As the smaller Titans flood the city, the two kids watch in horror as their mother is eaten alive. Eren vows that he will murder every single Titan and take revenge for all of mankind. Nominated for the 4th Manga Taisho Awards (2011) and won the Kodansha Manga Award shōnen category (2011). In English, the series is roughly translated to 'Attack on Titan'.
Frieda Reiss (フリーダ・レイス,Furīda Reisu?) was Rod Reiss' eldest daughter and Historia's half-sister. She is known to appear in Eren's and Historia's dreams.
She first appears in Eren's dream, with him seeing her from her own perspective, while she looks into a mirror. In Historia's dream however, she actually interacts with Frieda. She teaches Historia how to read and tells her to become a kind person. Frieda appears moved when Historia claims that she wants to be like her and then proceeds to manipulate Historia's memory, telling her to forget about her until they see each other again. (...read more)
With Eren still held captive below the Reiss family chapel, Rod Reiss explains the history of Historia's half-sister, Frieda, and her eventual fate after the family's encounter with Grisha during the fall of Wall Maria five years ago. Rod reveals that Grisha, in his Titan form, fought and defeated Frieda and stole her Titan powers, with the intent on ending the Reiss family bloodline forever. Meanwhile, with the success of the revolution fresh out of its core, an uncertain tension arises between Erwin, Pixis and Darius Zackly. With Rod in the final stage of his plans, Erwin, the entire military and Levi's squad prepare to lay siege against the chapel to rescue Eren and stop Reiss once and for all.
As the Survey Corps enters the world outside the Walls in the 57th Expedition, Erwin, Eren and Armin go their separate ways deep into Titan territory. Erwin deploys the “Formation for Long Distance Enemy Detection” to assure casualties are prevented. After meeting several abnormals, Armin's squad encounters a mysterious Female Titan that slaughters his comrades but after viewing his face, decides to let him live. Despite Reiner's success in escaping it's grasp, the Female Titan leaves the fray and instead appears to head towards Eren's location, at the rear of the formation.