Finn Mertens, commonly known as Finn the Human, is the main protagonist of the animated series Adventure Time. As the last known human in the Land of Ooo, Finn is a brave, adventurous, and kind-hearted boy who seeks to protect the innocent and defeat evil. He is best friends with Jake the Dog, with whom he embarks on countless quests. Finn's character grows throughout the series, facing moral challenges and learning the complexities of heroism and friendship.