Roz

From Pixar Wiki

Performer:	Bob Peterson
Appeared in:	Monsters, Inc.

Roz is a character from Monsters, Inc. She appears to be the keymaster, holding all the keys to each doors at Monsters, Inc. Roz is a slug looking monster in the movie and is voiced by Bob Peterson.

In the end of the film, it was revealed that Roz was number 1 of the Child Detection Agency (C.D.A).