Hange thought it was a good idea to experiment on you and Levi. However she didn't expect you to turn into babies. In a state of panic she put you and Levi in front of Miches quarters and ran away. When miche opened the door and saw you guys his eyes widen

"What the hell.." He mumbles as he kneels down. Levi looks up at him and starts whimpering and babbling trying to tell Miche what happened while holding your hand. Miche smiled at this. Levi seemed attached to you even as a baby.