Doctor Gustav von Schneider
Doctor Gustav is known to be Kauff's arch-enemy. Despite the simple characteristic, he's a much more complex character than one might think at first glance.
Gustav was "born" on the 3rd of October 2009 as a result of a histerical brainstorming session between Andrei and Marius "Majus" Fietzek. While Majus formed most of the character's major traits, Andrei picked the name based on a close family friend.
It is rumored that the creators know the real reason for which Kauff and Gustav are arch-enemies and why they are so keen on being such a constant annoyance to each-other. However, they haven't disclosed it yet.
Gustav, also known as a "Monkeyologist", takes pleasure in taking over Kauff's show and questions from time to time. It is rumored that he has a son but nothing is known regarding a possible wife. His "trademark" pipe always makes an appearance, even though the first version of it got destroyed during the filming of Episode 6 from Season 1 of "Ask a Monkeyologist".
The Wig joke took shape after Gustav's first appearance, when Majus had to buy a bigger wig since the old one was very difficult to work with. Also, during the second season, Gustav's black mustache suffered a tragic accident and had to be replaced with a gray one.
The bow tie is a tiny reference to Doctor Who, a show which both creators are fond of and they constantly make references to it throughout the show.
Real!