Who is Mike in Monsters, Inc.?

One-eyed green monster, Sulley's best friend, coach, and comedic partner.

Who plays Mike in Monsters, Inc.?

Mike is played by Billy Crystal.

Mike's abilities include coaching, strategic planning, public speaking, agility.

Mike has 8 mapped relationships in Monsters, Inc.. Explore the interactive relationship map for details.

Mike — related — Sullivan (John Goodman)
Mike — related — Roz (Bob Peterson)
Mike — related — Waternoose (James Coburn)
Mike — Social Best Friend — Sullivan (John Goodman)
A close friendship that anchors the story.

The plot calls Mike Sullivan's best friend and assistant, and they repeatedly support each other during the crisis.
Mike — Alliance Reluctant Ally — Boo (Mary Gibbs)
Mike gradually accepts responsibility for protecting Boo.

Mike helps Sullivan hide Boo, searches for her door, and later joins the rescue and exposure of Waternoose.
Mike — Conflict Kidnapper — Randall (Steve Buscemi)
Randall treats Mike as an obstacle and an expendable captive.

Randall waits for Boo but accidentally kidnaps Mike, then reveals his plan involving the Scream Extractor.
Mike — Power Executive Authority — Waternoose (James Coburn)
He uses institutional power to remove Mike from the factory.

Waternoose banishes Mike and Sullivan to the Himalayas after Boo reveals herself to him.
Mike — Alliance Secret Ally — Roz (Bob Peterson)
Her hidden support protects the protagonists' objective.

Roz's undercover CDA role helps expose Waternoose and enables Mike and Sullivan to complete their rescue plan.