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Beemo is much more than just Finn and Jake's roommate. Beemo is also their friend, camera, alarm clock and video game system.
Lumpy Space Princess comes from the cloud-like kingdom of Lumpy Space. She acts like a typical spoiled teenager.
Flame Princess is a hot-headed princess from the Fire Kingdom and Finn's new crush. Her flame powers are tied to her emotions, and she's been known to anger quite easily.
Gunter is the name the Ice King gives to all of his penguin servants, yet he pronounces it differently depending on the penguin's personality.
An alternate, female version of Finn, Fionna the human is just as brave, adventurous and awesome as her male counterpart as she faces off against her enemy, the Ice Queen.
Cake the cat is an alternate, female version of Jake. She has similar powers that let her stretch, bend and morph her body, and her boyfriend is Lord Monochromicorn.
As a millionaire nerd enthusiast, Princess Bubblegum immerses herself in every branch of geekdom from rocket science to turtle farming.
Marceline is a wild rocker girl. Centuries of wandering the Land of Ooo have made her a fearless daredevil.
Lady's Princess Bubblegum's loyal and majestic pet. Her love of the viola makes her a perfect match for Jake.
Armed with a magic crown and a icy heart, the Ice King has only one goal: to secure a wife by any means necessary.
Finn's best friend is a wise, old dog with a big heart. Jake has the magical ability to stretch and grow. When evil is not running amok, he plays viola with his girlfriend, Lady Rainicorn.
Finn is a silly kid who wants to become a hero one day. He might not look too tough, but if there is evil around, he will slay it. That's his deal.