21. Crushing Blow - The 57th Exterior Scouting Mission (5)

Complete story — includes the ending

Erwin realizes it was a mistake to think that all intelligent Titans are like Eren, since the Female Titan has abilities far beyond that of a novice. The mole once again transforms into the Female Titan and chases after Levi's squad. Armin theorizes that the mole is someone who had seen Eren transform during the invasion of the Trost District. Eren wants to transform but the squad tells him to trust in their skills to protect him. Eld, Oruo, and Petra manage to blind the Titan; however, she regenerates her right eye and kills all three of them. Grieving and furious, Eren transforms into a Titan. Believing his squad's death could have been avoided if he'd transformed in the first place, he fights the Titan but she defeats him by beheading him and swallowing his human body. Mikasa attempts to intervene, but to no avail. Levi arrives, telling her to keep her distance, as the Female Titan is getting tired and they can take advantage.