Why is boo a prisoner?

Answer 1

Boo is a prisoner in the "Monsters, Inc." universe because he is a human child who accidentally enters the monster world. Monsters are taught to fear and avoid humans, believing them to be dangerous. Boo's presence is a violation of the rules, leading to her being pursued and kept hidden by the monsters, particularly Randall and Waternoose, who view her as a threat to their society. Ultimately, her innocence and connection with Sulley challenge the monsters' perceptions and the need for fear.