Finn

Finn (or Pen, from the pilot episode, or full title: Finn the Human Boy) is the main protagonist of the series Adventure Time.

Background
As shown in "Memories of Boom Boom Mountain," Finn appears to have been abandoned during infancy, left alone in a woodland. He reveals that he made "boom boom" (in reference to bathroom jargon) on a large leaf, fell on it, and lay there until Joshua and Margaret (the mother and father of secondary protagonist Jake) rescued him from the wilderness to raise him along with Jake, who becomes like a brother to him. (As such, Jermaine is also Finn's adoptive brother.) In "Henchman," when Finn is asked about his parents, he says Jake told him that he came from a cabbage in jest. In "Susan Strong," Finn states that he doesn't know anything about his parents or any other family members.

Status as the last human
Finn may be the last human in the Land of Ooo, or possibly the world. In the episode "Her Parents," Lady Rainicorn's mom says she thought humans were extinct. This lends new significance to his title Finn the human, as his humanity may be unique in Ooo. Up to the episode "Susan Strong," Finn believes he has never met another human. The characters that appear human-like are actually mutants or "humanoids." Finn becomes depressed and "soul-searchy" when he thinks about it.

Finn encounters Susan Strong whose identity as a human or mutant is left ambiguous, even though the others in the Hyoomen Tribe were revealed to be mutants. Note that Fionna (the gender-swapped version of Finn) is also a human, but it's not clear whether the gender-swapped characters exist in the same universe, period of time, or reality as the main series.

Appearance and equipment
Finn is a 13 year old human. He has very thin, flimsy looking limbs and wears a white hat with two "ears" sticking out on top, which he has proclaimed is "awesome." His hat covers his entire head, except for his face. He also wears a blue short-sleeved shirt, blue-jean shorts, a green backpack, rolled-down white socks, and a pair of black shoes. When he's in the Ice Kingdom, he occasionally wears a yellow sweater. He has several missing teeth because "he bites trees and rocks and stuff," according to Pendleton Ward, the creator of Adventure Time. Ward has also stated that Finn has blonde hair which can be seen in "To Cut a Woman's Hair," where Finn removed his hat (one of three times he has done this), and long golden locks of hair flowed out. His hair had a glowing sheen and extended his body length, until he cut it off and gave it to the Tree Witch. His hair subsequently has started to grow back, as shown in "Mortal Folly", and in "Heat Signature". He wears white briefs that made an appearance in "City of Thieves," when Penny stripped him at the end of the episode.

Finn's favored weapon is a sword that he sometimes carries. Pendleton Ward has stated that his sword is made of gold. As of the episode "The Other Tarts ", Finn is shown using a new sword with a pink/silver blade and a red, twisted "root" handle. Finn's original golden sword was destroyed in a black hole during a previous episode".

Personality and character traits
Though at times violent and aggressive, Finn is a brave and righteous hero. He has a very strong sense of responsibility and gets upset when he is unable to help others. He is almost physically incapable of doing anything evil or unjust, and will struggle greatly against doing such thing, as seen in several episodes such as "City of Thieves," "The Eyes," and "The Enchiridion!." Finn is shown to be a fearless thrill-seeker and enjoys putting himself in the midst of danger simply because he enjoys a challenge. However, as illustrated in "Ocean of Fear," Finn has an unexplained phobia of the ocean, or thalassophobia, despite the fact that he can effortlessly come into contact with any other body of water. While he portrays himself as a rough and tough hero, Finn has a tender side capable of love and compassion, as shown by his boyhood crush on Princess Bubblegum and his brotherly relationship with Jake. However, Finn seems to hate romance movies and kissing because in "Go With Me" he actually vomits during a kissing scene in a movie.

His aspirations to be a great hero make Finn somewhat of a moral sheriff to the Land of Ooo, as he is willing to help and protect any innocent creature in his strange world. Finn gets a lot of conflicting emotions when it's unclear whether something is good or evil, exemplified by his dealings with Marceline in the episode "Henchman."

Abilities
Despite his age, Finn is proficient in several forms of combat, including hand-to-hand, magic, and sword fighting. He can jump very high and is exceptionally strong and agile for a boy of his age; he is seen equally wrestling full-grown Marauders, the large grass ogre Donny, and a general variety of monsters and creatures several times his size.

Besides in combat, Finn has an impressive lists of other skills. He has some origami skills, as shown in "Ricardio the Heart Guy" in which he makes Princess Bubblegum a paper crane. Finn has been seen enjoying singing and gained the ability to auto-tune his voice on command after eating a tiny computer. Apparently, Finn can play the flute, as seen in "Prisoners of Love", when he plays a little selection before throwing his flute at Ice King. He is very good at playing a video game called Adventure Masters, which he and Jake play on Beemo from time to time. Finn is also somewhat gifted at constructing simple machines, such as the catapult in "The Witch's Garden." He can also spit very long distances, as demonstrated in "Evicted!" when he spits on Marceline and in "My Two Favorite People" when Finn spits on Tiffany's face. In "Dungeon," one of the trials that Jake says Finn would have breezed through is a spitting competition against a goblin-like creature. Finn writes and draws with his left hand and occasionally with both hands at the same time. He additionally handles his sword with his right hand, suggesting he may be ambidextrous, which means that he can use both his hands with equal ability. Finn is shown to be great with talking to women, especially princesses.

One-time abilities
Finn and Jake gained magical abilities in the episode "Wizard" but they have never used those abilities in any other episode. Pendleton Ward later revealed on his Formspring that all of the magic Finn and Jake gained in that episode was contained in their robes, which were later destroyed.

Likewise in "The Chamber of Frozen Blades" Finn and Jake gain ice ninja skills, but it's unlikely they will use them again because, according to Adam Muto, "[they] didn't have enough time to commit the incantations and hand positions to memory."

Relationships
Being a hero, Finn has become quite popular in the Land of Ooo, starting many quick friendly relationships.

Jake
As both housemates and best friends, Finn and Jake have shared a deep bond for most of their lives. Having been raised together by Jake's parents, the duo have a relationship similar to that of siblings, with Jake acting as Finn's older brother. Though they have an unconditional love for each other, Finn can get frustrated with Jake because of his laziness and lack of motivation, shown especially in "The Witch's Garden." As a more laid-back character, Jake often tries to relax Finn's fiery personality in the face of a struggle, advising him not to worry in most situations. Though he sometimes leads Finn down the wrong path, Jake genuinely means well for his companion and is usually an encouraging and protecting figure in Finn's life. Finn and Jake are apparently very big influences for each other. In "Dungeon," Finn sings "I want to have your baby" in the Key Song. Later in the series, in "Rainy Day Daydream," Jake playfully says the same thing to one of the imaginary girls, regarding his relationship with Lady Rainicorn.

Lady Rainicorn
Finn became friends with Lady Rainicorn after Jake wanted to hang out with both of them at once in the episode "My Two Favorite People". At first Jake regretted introducing the two, but in the end he was glad it happened. Finn and Lady Rainicorn still share a close bond, despite the fact that Finn can't understand Lady Rainicorn's fluent Korean.

Princess Bubblegum
Finn, as young adolescents often do, has a rather obvious crush, which he denies, on Princess Bubblegum. He is known to interact with her more than any of the numerous other princesses of Ooo, and will jump at the chance to do anything for her. Whenever someone says "Finn," "Princess Bubblegum," and "crush" in the same sentence, he growls and blushes fiercely. Finn does get very protective when someone else comes in between them, as seen in "Ricardio the Heart Guy" in which he claimed to be not jealous, but "weird." Though the princess is seemingly oblivious to Finn's affection, she often calls on him for any royal need. In "The Real You" Princess Bubblegum kisses Finn on the cheek, and he faints a moment after the kiss. Finn always eagerly hopes to win the princess over with his heroic deeds. Finn and Princess Bubblegum share a staunch sense of morality and often work together to bring justice and balance to the Land of Ooo. Finn tries to take her on a "date" in "Go With Me," but Princess Bubblegum later bans Finn from the Candy Kingdom until he stops "acting like a psycho" in the same episode (unbeknownst to her, Marceline influenced it). In Mortal Folly, when Finn and Jake are chasing the Lich King, The Ice King keeps nagging for them to give him permission to marry PB. When he says " its not like you want to marry her" Finn blushes and throws a rock at him. This hints that Finn may want to marry PB. As of Mortal Recoil, Princess Bubblegum has become 13 years old as a result of her doctors not having enough bubblegum to reassemble her at the end of the episode and she later hugs him and calls him, "Hero". Finn sometimes calls Princess Bubblegum "Peables".

Marceline
Though seen as an enemy in her debut, Finn quickly befriends Marceline the Vampire Queen, as he realizes that her seemingly evil ways are just forms of playful teasing. A rowdy and adventurous character, Marceline and Finn share the same vigor and thirst for danger. Marceline finds all kinds of ways to mess with Finn in his head, but are really just mind games of hers. Although Jake still doesn't like Marceline (because Jake is afraid of vampires), Finn still likes hanging out with her and being "awesome together." In "Go With Me" Finn asks her to go to "Couples Only Movie Night", but only thinks of her as a friend. He was actually grossed out by the idea of kissing, and likewise Marceline did not want to date him. .

Quotes
See Finn/Quotes﻿

Trivia

 * In the pilot, Finn is voiced by Zack Shada. However, in the series, he is voiced by Zack's younger brother, Jeremy Shada.
 * Finn stated in the pilot that he was 12. However, as of "Mystery Train" he has aged and is now 13 years old, as confirmed by both Natasha Allegri, Adam Muto , and in "Mortal Recoil"
 * Finn is still technically the king of the goblins, even though he left Whisper Dan to take his place, the goblins still believe its him.
 * In the episode "Ocean of Fear", Finn is revealed to have Thalassophobia, which is a fear of oceans or seas. Finn has no problem swimming in the episodes "Business Time", "My Two Favorite People", and "The Witch's Garden" because he has a specific fear of the ocean, and not small bodies of water such as lakes, rivers, wells or puddles.
 * Finn is going through puberty, as in some episodes his voice cracks, mostly when he screams. A good example of this is in the episode "Ocean of Fear". This is also suggested by an enigmatic answer given by Adam Muto.
 * Finn can sing in autotune as seen in "The Jiggler" (he sings Baby) and "Freak City" (he sings The Hero Boy Named Finn). Finn reveals to Jake in "The Jiggler" that he has the ability to sing in autotune after swallowing a small computer. However, Finn can also sing without autotuned effects, as demonstrated with numerous other songs, such as the Goblin Song and the Stuff Song.
 * Finn has claimed to be "all about" several things. In "Freak City", Finn says he is "frickin' all about sugar". Yet, he also explains that he is even more all about feeding hobos. In "The Real You" Finn shouts "I'm all about stupid!"
 * Finn has a female counterpart, Fionna, made by Adventure Time character designer Natasha Allegri.
 * In the episode "Slumber Party Panic" a zombie version of Finn makes a cameo appearance seen here. This could mean that there is candy person that looks like Finn.
 * Finn is very tolerant of pain, although in "Crystals Have Power", he cries slightly when Jake pinches him and may have "Cried into his pillow for thirty minutes."
 * Finn and Jake sometimes use math terms for catchphrases (Examples: Mathematical!, Rhombus!, Algebraic!). Finn may do this because Princess Bubblegum is a scientist and that he might be trying to impress her.
 * Finn's favorite color is baby blue, as shown in "The Silent King"

Hat

 * Apparently, Finn has always had (or very close to always had) his awesome hat. In the episode "Memories of Boom Boom Mountain" the viewer can see Finn as a baby wearing the same exact hat, except that it is a smaller size.
 * In the Animated Short, the hole in his hat is half of a circle, instead of a full circle in the cartoon.
 * Finn's hat has a small resemblance of Bueno the Bear from "Barrista" which is a short from the creator.
 * His hat somewhat resembles Max's hat from Where the Wild Things Are. Also, the two 'ears' on his hat are portrayed as a cat's ears in FusionFall. It's sometimes referred to as a 'bear hat'.

References in other media

 * Finn appears as a playable character on Cartoon Network's TKO where his special moves are Look Out Below (when Jake falls on your opponent) and Sidekick Swing (when Finn grabs Jake's paw and Jake swings him at the opponent) and his super move is when Jake falls onto the opponent with an axe.
 * Finn and Jake were voted best duo of 2010, surpassing Regular Show's Mordecai and Rigby.
 * Both Finn and Jake made an appearance on MAD's "Malcolm in the Middle Earth", but Finn's shirt and pants were miscolored green, his backpack was miscolored blue, showing that as mixed color scheme, probably just for a laugh along with a 12 year old boy's voice, and his hat was more pointy, like a cat's head, and holding a sign saying "What Time Is It?"
 * Finn, Jake, Bubblegum, Lady Rainicorn, Ice King, Stanley the watermelon, and the Reaper are characters in the game Fusionfall, in which the player helps Finn save two princesses, get shirts from Stanley, and train with Finn in the petting zoo (Generator Rex).
 * Like most of the main characters, Finn is an Exosuit in the game Project Exonaut.