Name: Finn the Human
Finn (full title: Finn the Human and formerly known as Pen in the original short) is the main protagonist of the series Adventure Time.
Finn is a 14-year-old human. He has very thin, noodly limbs. He has several missing teeth because he bites trees and rocks among other things.
Although his eyes typically lack detail and appear as small black dots due to a minor mutation, they are shown to have color in the episode "The Enchiridion!," when Finn is tried by the Dark Magician. His left eye is green while his right eye is blue, characteristic of the genetic condition heterochromia. (But as stated by Andy on Formspring, "That was a special occasion. The heterochromatic effect was a byproduct of him being hypnotized by that guardian dude." Andy Ristaino confirmed that Finn's eyes are blue.
Finn has blonde hair which can be seen in "To Cut a Woman's Hair," where Finn removed his hat, 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 began to regrow, as shown in "Mortal Folly," "Heat Signature," "Apple Thief," "Beautopia," "No One Can Hear You," "Another Way," and "Beyond this Earthly Realm." In "Beyond this Earthly Realm," Finn's hair was shown to have grown past his shoulders and in "Gotcha," LSP's vision of Finn shown that his hair had grown to his waist.
Finn wears a white hat with two "ears" sticking out on top. The hat is inspired by Bueno the Bear, a bear that appears in comics made by Pendleton Ward, the creator of Adventure Time. He has proclaimed it to be "awesome." Finn's hat is bear themed; coincidentally the Hyoomens wear animal themed hats as well. This might be a hint that humans in the Land of Ooo wear animal hats to fit in the society. Finn's hat covers his entire head except for his face. He also wears a light-blue T-shirt, denim shorts, a green backpack, rolled-down white socks, and a pair of black shoes.