A Priest of the Wall is preaching in a packed temple, when all of a sudden, Annie the Titan bursts through the walls, killing dozens. When Eren punched her, he wasn’t thinking about the people inside, but rather how much damage he could do to Annie with his punch. Annie, who always looked so smug and bored, keeping her dark secret to herself while mixing with the rest of humanity when it suited her.
No more. Eren’s fighting spirit is fueled just as much by hate and resentment than a desire to save mankind. And in order to beat Annie, who has shed her allegiance to humanity altogether, he must be a monster, unconcered with the collateral damage to the district.
Even though those behind Wall Sina contribute next to nothing to the survival of mankind, and live within a false shell of security forged from the deaths of those from the outer walls, they’re still largely innocent men, women, and children, like a little girl walking through the streets, bloodied, dazed, and almost certainly orphaned. While this is on the whole a duel between giants in what is to them a toy city, the episode makes sure to capture the human toll of their brutal melee.
After getting beaten to a pulp by the technically superior Annie, Eren gets his second wind by remembering the promise he made five years ago after the Titans first invaded: he’d exterminate every last one of them without fail. That must naturally include Annie, so he powers up into a kind of overdrive mode and overpowers her. Panicked she may actually lose, Annie tries to flee over the wall.
Throughout the fight, we hear Eren’s inner monologue, but unfortunately, not Annie’s. However, we do see flashes of a past even in which her father is embracing her in apparent forgiveness, telling her he’ll be on her side even if the entire world becomes her enemy. The details on what exactly happened in Annie’s past to cause this encounter and lead to her gaining the ability to transform are nonexistent, but at least we now know that Annie’s actions weren’t totally random, but driven by this seminal past event in her life.
However much death and destruction she’s caused, she feels justified, if not totally immune to the judgment of the masses. Maybe she has no “leader” to report to or to deliver Eren to; perhaps Annie is doing all of this for Annie, and no one else.
Her getaway is thwarted by a clutch Mikasa, who is able to slice even Annie’s crystallized digits off, sending her falling to the ground, where a berserk Eren proceeds to de-limb and decapitate her. Hange is concerned he’ll kill Annie in his rage, and with it the captive the Scout Regiment needs to survive the ramifications of this operation.
But he doesn’t. When he sees Annie within the Titan nape, unconscious, helpless, crying, and connected by tissue the same way he is, Eren freezes. All the resolve he’d built up melts away simply due to the sight of the Annie he knows. That hesitation allows Annie to (voluntarily or not) become encased in hard crystal that no blade can cut.
Eren emerges from the Titan, exhausted but unharmed. Mikasa stays by his bedside as he makes a full recovery. Erwin manages to convince the Mayor and other bigwigs that they were able to accomplish something, by uncovering a potential epidemic of Titans hiding among mankind; Annie and Eren are surely not alone.
For now, Eren still has the key to his basement, Annie remains encased in crystal under Hange’s care, and Erwin vows to go on the offensive against the Titans. We have plenty of seeds for a second season, which is apparently arriving some time this year. With all the questions left unanswered mysteries left unsolved, and, of course, that creepy Titan peering out from inside the wall, I don’t see how I can miss it.