Ep 17 – “Female Titan: The 57th Exterior Scouting Mission, Part 1” / “Megata no Kyojin -Dai Gojū-Nana Kai Hekigai Chōsa (1)-“ (女型の巨人 ―第57回壁外調査①―)
During their expedition, the Scout Regiment set up a formation where several Scouts spread around the main group where they will report by flare gun if a Titan is nearby so the main group can steer to avoid them. After Armin’s squad manages to kill an Abnormal Titan, a Titan with a feminine body, suddenly appears from the right flank at high speed. Much to Armin’s shock, the Female Titan’s body can withstand their blades and is intelligent enough to kill his seniors easily. The Female Titan captures Armin but after removing his hood and seeing his face, she leaves him alive and continues running. Armin is picked up by Reiner and Jean, who reveals that their right flank was wiped out by the Titans, which makes Armin realize it was the Female Titan’s work and she is possibly another Titan Shifter like Eren. When the three of them give conflicting sources on where Eren is in the formation, they realize the Female Titan’s target is Eren and they must stop her. Despite their failed attempts to attack, she leaves them and heads towards the centre.