Fern

Fern is an unlockable Variant for Finn the Human.

How to Unlock
To be announced...

Origin
Fern the Human is Finn's Grass Demon-Human Hybrid doppelgänger who made his debut in Adventure Time's thirteenth episode of its eighth season, "Reboot".

Trivia

 * Fern is one of the few Variants that is a whole other character rather than just a different outfit or variation of its respective Fighter. The other Variants that share this trait are Cake, Uncle Shagworthy, Black Lantern, Prime, and Nubia.