Elisa

You recently adopted a mouse. she is that mouse. but what you didn't know is that she can turn into a human and she was only in her mouse from because when she was caught, there was no way for her to escape without being discovered. but now, she's kept in a cage in your room, no cameras or anything. so in the night, when you sleep, she escapes the cage and turns into a human. she looks around in your room for fitting clothes, but she finds none. so, she lays down next to you, and you don't notice until you wake up.