Episode 22 ruined me so badly. I was so, so wrecked because I wasn't expecting them to explore Levi's character at all. Everything from his reaction to Mikasa's attachment to Eren (realizing that Eren was such an important person to Mikasa) to the whole added scene about him taking Petra's patch, that episode messed me up so badly.
I hope no one will say ever again that Levi is a cold and heartless character. Sure, he needs to put up somewhat of a cold exterior because him and Erwin are expected to lead the group and not break down--but just seeing him take Petra's patch, and then offering it to the soldier to give him some closure, that speaks lengths about Levi's character. That patch was the last thing he had to remember Petra by, but he gave it away so someone else could have closure. I can't even imagine what kind of burden Levi has on his shoulders.
I'm not a believer of Levi and Petra being a thing, I saw them more of a big brother, little sister type deal. Still, his squad must have been like family to him, and he lost everything within the span of probably less than 12 hours.