|The following information is from the Adventure Time comic book series. It may not be part of the same canon or continuity as the animated series.|
Penelope is an adventurer who lives in the far future with her magical cat companion. She was first seen at the end of Issue 25, retrieving Carl the Gem and Gemma the Gemstone from Finn and his friends' dungeon. Later, she entered the ruins of Princess Bubblegum's library hoping to find something that would help her fight the Awful Offal Abominations plaguing the land, although all she found was a comic book released by Marceline.
- In Issue 50, it's revealed that she is a female, future version of Finn.