- WALL•E: "WALL•E."
- —WALL•E and M-O introduce each other
M-O (Microbe-Obliterator) is the tritagonist in WALL•E. He is a robot aboard the Axiom programmed to clean items deemed contaminated. M-O is obsessed of keeping things exempt of "Foreign Contaminant", and can do anything to complete this task (an example is when WALL•E teasingly wipes the dirt off one of his treads and covers M-O's face with it, he screams and franctically tries to clean his own face!) He travels around on a single roller, equipped with cleaning tools. M-O eventually befriends WALL•E after all his attempts to clean the dirty robot, following him all over the ship. His timely arrival in the garbage disposal area proves significant when he unintentionally wedges himself between the closing doors to prevent WALL•E and EVE from being jettisoned out into the space. He then fully cleans WALL•E and accompanies him and EVE into bringing the plant to the holodetector on the lido deck so the Axiom can jump to Earth. However, WALL•E accidentally drops the plant when he sideswipes the holo-detector, and the plant is thought to be lost until M-O finds it with the help of his functionality that detects foreign contaminant and has robots and humans pass it all the way up to EVE. After they arrive back on Earth, M-O ushers the other robots into giving WALL•E and EVE some privacy as they share a tender moment.
Basic Parts; A brush instead of arms, a white body, yellow eyes on a LED screen, a siren, a blue brush cover, a roller, a backpack, and extendable black parts.
- In the movie there is only one M-O unit but in the video game there are two.