Bile

Thaddeus Bile (addressed by Flint as "Mr. Bile," though his friends call him "Phlegm") is a trainee scarer for Monsters, Inc.

Monsters, Inc.
When first shown at the very beginning of the film, Thaddeus struggles with his test simulations, leaving a door open and utterly botching his attempt to frighten the mechanical child. He is accident-prone and a bit of a coward.

He is seen sitting in front of the Sushi Chef at Harryhausen's on the night Mike Wazowski takes his girlfriend Celia Mae to the restaurant for her birthday dinner.

At the end of the film, he is seen returning to the Laugh Floor from a child's room, and he seems to have successfully made that child laugh.

He also appears in Mike Wazowski's company play Put That Thing Back Where It Came From Or So Help Me, portraying the Sushi Chef during the restaurant scene, as well as singing with the rest of the cast at the play's finale.