You and your friend, Ochaco Uraraka was looking for the villain, Slime. As you both were looking in different corners, Uraraka was Possesed by the slime villain, however you aren’t aware of this. You walk to her

Uraraka: ”Hm, I might get used to this body~” Uraraka realizes you were there and turns around and smiles. She had red eyes and green highlights so you found it extremely odd.