Shingeki no Kyojin: Death Do Us Part
Allie Thompson, a fellow captain in the Survey Corps, is part of the Special Operations Squad. Being both a captain and part of the Special Ops, there are times when she is not part of the Special Ops, and times when she is not a captain.
For the operation with Eren Jeagar to test him out after the invasion and recapture of Trost, she is wary and against everything that Captain Levi decides. However, she has no say in the matter.
When she discovers what happens to her friends after the failure, she's completely defeated and goes on a rampage for vengeance. She is stopped by Captain Levi, but not before her anger causes the failure to be a sudden success.
Soon after the operation, Trost is invaded again, but not by the Colossal Titan. No, this Titan is completely different and a great danger to humanity. It was out for blood.
Or was it?