Finn the Human is the main character of
Adventure Time and often appears alongside his best friend and adoptive brother Jake the Dog. Finn was adopted by Jake's parents Joshua and Margaret as an infant. He is originally believed to be the only human left in Ooo after the "Great Mushroom War", a mysterious conflict that occurred 1,000 years prior to the start of the series. It is later shown that he was born on Hub Island, part of an isolated archipelago populated by humans. Finn's biological father Martin (
Stephen Root) is a conman, while his mother Minerva (
Sharon Horgan) is a doctor. Martin fled Hub Island with an infant Finn after being found by disgruntled acquaintances from his past. He was separated from Finn, who was left on a raft floating towards the mainland. In "His Hero", Finn meets the legendary adventurer Billy (
Lou Ferrigno), who unsuccessfully tries to convince Finn to give up violence. Finn and Jake go on a quest to find the
Lich (
Ron Perlman), an ancient undead king, in the second-season episodes "
Mortal Folly / Mortal Recoil". The Lich returns in the
fourth season finale "
The Lich", and kills Billy. After taking control of Billy's body, the Lich attempts to trick Finn and Jake into giving him the Enchiridion. Finn experiences other alternate lives and versions of himself throughout the series, all of whom have lost their right arm. This foreshadows Finn's eventual loss of his arm in the
season 6 premiere "
Wake Up / Escape from the Citadel". In "Escape from the Citadel", Finn discovers that his father Martin is an inmate of the Citadel, a
multiversal prison reserved for those who commit a "cosmic crime". Finn and Jake go to the Citadel to find Martin. The Lich arrives and attempts to free its prisoners so he can use them as an army. Finn loses his arm when the Lich destroys the Citadel, and Martin escapes. Finn is changed by the loss of his arm and becomes disillusioned with his father. A flower blooms from the stump where Finn's arm used to be, and eventually grows into a new arm. He loses his control of his regrown arm, which transforms into a grass
doppelgänger called Fern in the
eighth season two-part episode "Preboot / Reboot". The violent and reckless Fern acts as a
foil to Finn, who has matured over the course of the series. In the following episode, "Two Swords," Finn is fitted with a robotic arm by Princess Bubblegum. The miniseries
Islands, which aired as part of season eight, sees Finn search for the surviving humans who left the continent and moved to an archipelago centuries after the Great Mushroom War. Finn meets his mother Minerva, a doctor who has
uploaded her mind to a network of robots. Minerva tries to force Finn to stay on the island where she can protect him until Finn convinces her to let him go. He invites the humans to return to Ooo, but they choose to remain on their islands for the time being. In the series finale "
Come Along With Me," Finn and Jake help Princess Bubblegum fight her dictatorial uncle Gumbald. Realizing that violence is not the answer to the conflict, they ally with Gumbald to defeat the evil deity GOLB, who is intent on destroying Ooo. Finn's robotic arm is snapped off when he and the other protagonists are eaten by GOLB. The seedling grows into a new treehouse, with a grass sword inside. Finn and Jake are shown relaxing on a beach when the humans return to Ooo for the first time in centuries. The
Adventure Time: Distant Lands special "Together Again" takes place sometime after the end of the series, when Finn has died of old age. He then journeys through the Dead Worlds to be reunited with Jake, who predeceased him. After reuniting with Jake in the afterlife, the two choose to reincarnate back into the living world together.
Others Since
Adventure Time's inception, Finn has appeared in various comic book series, video games, and other merchandise. Finn's first
console game appearance was as a playable character in ''
Adventure Time: Hey Ice King! Why'd You Steal Our Garbage?!!, which was released on Nintendo DS and 3DS in 2012. He was subsequently a playable character in Adventure Time: Explore the Dungeon Because I Don't Know! (2013), Adventure Time: The Secret of the Nameless Kingdom (2014), and Adventure Time: Pirates of the Enchiridion'' (2018). Finn has also made
crossover appearances in other franchises and media. He appeared in the
seventh season Futurama episode "
Leela and the Genestalk". The opening sequence
couch gag in the
28th season The Simpsons episode "
Monty Burns' Fleeing Circus" featured
Bart Simpson as "Bart the Boy", a parody of Finn. He also appeared in the
Uncle Grandpa episodes "Pizza Eve" and "Cartoon Factory". He also appeared in the ''
OK K.O.! Let's Be Heroes episode, "Crossover Nexus". Finn is a playable character in toys-to-life game Lego Dimensions'' (2015),
beat 'em up game
Cartoon Network: Battle Crashers (2016), crossover game
Bloons Tower Defense: Adventure Time (2018),
fighting game Brawlhalla (2019), and
action-adventure game Immortals Fenyx Rising (2020). In November 2021, Finn was confirmed to appear as a playable character in the fighting game
MultiVersus (2024). He appeared in the
Teen Titans Go! episode, "Warner Bros. 100th Anniversary".
Fionna and Cake A
gender-swapped version of Finn called Fionna appeared in the season 3 episode "
Fionna and Cake", voiced by
Madeleine Martin. Fionna inhabits a fictional world created by the Ice King (
Tom Kenny) as a form of in-universe
fanfiction. The concept for Fionna and Cake came from drawings made by
Adventure Time storyboard artist
Natasha Allegri. The
tomboy-ish character of Fionna has much the same personality as Finn and has similar struggles with romantic attractions. Both Fionna and Cake the Cat, the alternate version of Jake the Dog, became popular with
Adventure Time fans. Fionna later appeared in the fifth-season episode "
Bad Little Boy", the sixth-season episode "The Prince Who Wanted Everything", the eighth-season episode "Five Short Tables", and the
ninth season episode "Fionna and Cake and Fionna". Fionna stars in the
spin-off series
Adventure Time: Fionna and Cake. == Characteristics ==