Mailsman

Mailsman (occasionally Mails Man), is an antagonistic main character. Often appearing to taunt or compete with Dudebroski and Idiot.

Appearance
Mailsman is an average stick figure with two arms, and balled hands. His head is a giant white paper envelope and he can sometimes be seen with a letterman bag.

Personality
Mailsman is antagonistic but doesn't always have bad intentions behind his actions. He often hosts (mostly) harmless parties in his house with his friend/assistant Fat Around The Edges, and invites Dudebroski and Idiot.

He also isn't usually the one who actually comes up with ways to interact with Dudebroski and Idiot, it is more than often Fat Around The Edges who suggests for them to do things together, like making a competing Tv show in News.

Trivia
Mailsman is one of the only characters with both arms, complete with hands

He is the only character that speaks gibberish

Mailsman is the only character we can assume has a job, being a mailman.

Mailsman has appeared in almost every episode.