Mike is a gentle, easy-going fellow who supervises the mailroom down in the depths of Gru's secret lair. Unfortunately, that also means he has to supervise Ken, another minion who's not terribly fond of, or dedicated to, his particular job of sorting incoming packages.
Mike, however, takes a great deal of pride in his job of marking each incoming package for sorting and sending through one of four color-coded pipes, which route the sorted packages to other parts of the lair. He's also something of a neatnik, and prefers to keep his color-coded stampers perfectly organized. This is also true of his work space, which is very neat and orderly, and has several pictures (and calendars) of fluffy kittens mounted on the wall next to it.