Pillow is a fluffy white pillow, who is unpredictable. She can stuff objects in her pillowcase or use it as a weapon. However, she's not all that powerful... she can't even tell which things she's allowed to eat.
Pillow likes to think of herself as a scientist, although her research is often faulty. For instance, she once believed that people who waved their arms didn't care about things. She was wrong. Not a good look for a scientist, don't you agree?
Fun fact: Pillow doesn’t know how to write.