CMO is a type of cuboid robot with a (usually cheery) face on its screen. Like BMO, it is a member of the MO series of robots created at MO Co. by Moe. Unlike BMO, however, more than one CMO exists, and indeed, CMO seems to be a very common member of the MO series.
Personality and traits
Very little is known about CMO. One first appears as a cameo in the episode "Puhoy." Later, in "Be More," many CMOs are shown among the MO society in the lower living levels of MO Co., suggesting it is a very common type of MO, and a single CMO is seen functioning as part of Moe's entourage of assistants in his living quarters.
CMO is similar to BMO, but is smaller, gray-to-beige in color, is more of a cube instead of a rectangular prism as shown in "Be More", and with only a slot for an optical disc and a black aperture of some unknown function below its screen, instead of BMO's several buttons and controller port. CMO also has a similar face/screen to BMO's, a trait common to the vast majority of members of the MO series. Due to its cheery attitude, CMO could stand for something like "Cheer more".