Flunky is the main antagonist of the game, and the first cog on the Bossbot corporate ladder. Flunky, along with the other first-tier cogs, starts on the Presentation Stage. He is one of the last cogs to move, only actually leaving the Presentation Stage on Night 3. He is also always the last cog to leave, no matter what AI he is set at.
Bottom Feeder is one of the many secondary antagonists of the game, and the first cog on the Lawbot corporate ladder. He, like Flunky, starts on the Presentation Stage, but leaves on Night 1. He is always the first cog to move, unless he is at the lowest AI level in a group.
Short Change is the first cog on the Cashbot corporate ladder. He, like Flunky and Bottom Feeder, starts on the Presentation Stage. Short Change leaves the Presentation Stage on Night 2.
Cold Caller is the first cog on the Sellbot corporate ladder. He, like the others before him, starts on the Presentation Stage. Cold Caller leaves the Presentation Stage on Night 2.
Micromanager is the fourth cog on the Bossbot corporate ladder. She starts in the Micromanagement Center. She moves on Night 3, and takes the vents more often than any other cog.
Mover & Shaker
Mover & Shaker is the fifth cog on the Sellbot corporate ladder. He starts in the Time-out Chair. He moves on Night 4. He has a Foxy-like mechanic: if he is watched just enough, he won't move. If he's watched too little or too much, he will move very quickly, disabling cameras as he goes.
The Big Cheese
The Big Cheese is the eight and last cog on the Bossbot corporate ladder. He starts in the Backroom. He has deteriorated quite a bit: his left hand is missing, he has large tears throughout his suit, and he is missing the left half of his suit face. He has a Puppet-like mechanic: if the Cog Scrambler inside of him is wound up, he will move slowly. If not, he moves very fast. His Cog Scrambler begins unwinding on Night 4.
Skelecog appears to be a Flunky Skelecog in a slumped-over position. It is unknown where Skelecog starts, as it simply appears in your office. You must flash it with the flashlight to make it disappear. It begins "moving" on Night 5.
Unfortunately, I couldn't find a Flunky Skelecog image. Sorry! :P
Images coming soon! :/