Himmel and Levi make up 🔥

Also, she is sentenced for her actions on the wall and with Reiner and Bertolt.

Himmel reckons with the consequences of her actions on the field, and tries to make amends with Levi.

Himmel is reunited with Levi on the battlefield. Eren's decision to punch a Titan is fateful, and results in a difficult farewell.

Himmel tries to come up with a plan that will keep everyone safe. Spoiler: All of her plans are bad.

Himmel escapes humanity with Reiner, Bertolt, Ymir, and Eren. In the forest, she finally learns a secret about her identity, and about Ymir.

Levi recounts one of the final jobs he did in the Undercity with Himmel, and why it was one of the last.

Atop Wall Rose, Reiner admits that he is the Armored, and Bertolt is the Colossal. When he promises Himmel answers about her true identity and her powers if she helps them escape to their hometown, what will Himmel decide?

Himmel spills her secret to Erwin, and news that there are Titans attacking Fort Utgard comes to light.

Original Text on Ao3. 

Himmel and Levi return to the barracks, and Himmel comes to terms with her failure to catch Annie today, as well as the burden she had put on Levi's shoulders by revealing her secret. 

*Final chapter of Season 1 Material.

Original Text on Ao3. 

When Eren fails to transform and fight Annie's Female Titan in Stohess, Himmel takes drastic measures to buy them time. Not only does she not expect to die; she also doesn't expect what happens after she dies.