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Mike Wazowski- One of the two main characters. Mike is a cyclops that is somewhat reluctant to trying to hide Boo. He grew up with Sulley and lives with him.
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James P. Sullivan (Sulley)- The other main character. Sulley is the one that advocates towards hiding Boo.
![Picture](/uploads/2/3/5/1/23514584/2132223.png?102)
Boo- The child that Mike and Sulley try to hide. The monsters are scared of the children at first, but realize that they aren't dangerous at the end.
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Randall- Mike and Sulley's main competitor. He tries to catch them with Boo so they can return her to her room. He also tries to "extract screams" from Mike when he won't tell them where Boo is.