Finn is a human boy in the Land of Ooo. In fact, he is the only human boy in Ooo.
Though at times violent and aggressive, Finn is a brave and rightThough 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 things. 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, Finn has an unexplained phobia of the ocean. 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. Finn’s aspirations to be a great hero makes him somewhat of a moral sheriff in the Land of Ooo, as he is willing to help and protect any innocent person or creature. Finn appears to be somewhat simple-minded, seeing that he gets a lot of conflicting emotions when it's unclear whether something is good or evil.
Finn always wears his light blue shirt, dark blue pants, and black shoes. He also carries around a backpack used for whatever is needed for a stiuation. Over his head, Finn wears a white hat with two "ears" sticking out on top. It covers his entire head other than his face. Under this, Finn has long blonde hair.
Finn lives with his best friend Jake in a Treehouse.