Adventure Time: Ranking Every Major Character From Worst To Best

This simple penguin who acted as the Ice King's main servant, adding little except the odd quack didn't feel like that much of a big deal at first. He may have been a bit of a trouble maker smashing the odd bottle here and there but that was about it.

However, it turned out that this unassuming little penguin was pure evil all along. His sinister nature was first referenced in the episode It Came From the Nightosphere, when the devilish Hunson Abadeer refereed to him as "the most evil thing I have ever encountered", but little did we know how dark things really were.

In the episode Reign of Gunters, Gunter uses the Ice King's demonic wishing eye to attempt to conquer all of Ooo. In later episodes it would be revealed that he isn't actually a penguin at all, but actually an evil space creature named Orgalog who wants to takeover the whole solar system, crushing anything or anyone in his way.

Pure evil disguised as a penguin nobody would ever suspect? Eat you heart out, Thanos.