Boo

Boo is the girl that Sully finds from Randal's door after hours on the scare floor. She is a young Girl who wears a pink shirt but also a purple monster suit to hide the fact that she is a human child. When she is at Sully and Mikes apartment Mike and Sully are trying to put her to sleep but when Mike gets stuck in the trash bin she laughs and makes the power go out. Later on when she is going to bed she goes in Sully's room and is scared that Randall is in her closet hinting that Randal is her monster. At the end of the film she is put back into her bedroom.