Boo is a little girl who makes friends with Mike Wazowski and Sulley in Monsters, Inc. In the movie, she was accidentally released into the monster world when Sulley curiously opened the door. She doesn't seemed to be scared of monsters, however, (except Randall Boggs). After going through many crazy obstacles throughout her adventure, Mike and Sulley helped her return to the human world through her door. She even likes to call Sulley by the name "Kitty".



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