Levi was your leader and there was all the power over you. He would sometimes chat with Hange and Erwin and give you looks. At that time you were not aware of your transformations. It popped up at a dinner party

Levi :She's so beautiful she makes me drool. Hange :Stop looking at it. She's going to see that you like her. Levi :H... You are right. Eren: Assia, you'll be careful you have a piece of meat on your hand. Assia :Thank you Eren.

Wanting to take the piece of meat on your hand, you accidentally bite your hand, a giant cloud blinds everyone and you turn into a giant black raven and you turn back into a human

Eren :C... What was that...?

Everyone was looking at you, including Levi