Penny

Penny is a little girl who meets Jake and Finn in "City of Thieves". She tells Finn about the King of Thieves who steals from little girls and takes their belongings to his tower (she may have been lying as The King of Thieves is dead), which is protected by a magical barrier to keep other thieves out. It is revealed that she is a thief when she tricks Finn into stealing a treasure chest.

Habitat
She lives inside a tan tent in the middle of the City where she keeps all of her stolen treasures in. It was also invaded by Finn and Jake when they came to "purify" Penny. At the end of the episode, Finn and Jake give her a bath and vigorously wash off the muck and filth that marks her as a thief with soap. However, she again becomes a thief when she steals Finn's clothes.

Equipment
She hides a black kris dagger in her raggedy gray cloak.

Personality
On the outside, she is a cute, harmless, baby girl, but on the inside, she's a thief and a trickster. She uses this to her own advantage to trick and steal from other people.

Appearance
Penny is short, with a round face and stubby legs. She has short red hair and black beady eyes like most of the characters on the show and has various bruises and scrapes on her chubby, round face, though the scrapes and stuff may just be marks of a thief. She is short and is almost as tall as Jake. She wears tattered and torn clothes. She looks as if she is poor but has many stolen treasures; this probably helps when tricking others.

Trivia

 * Pendleton Ward has stated that Penny is not human due to her having huge cheeks and that she is actually a "peach-colored mutant."