Finn

Finn:

At first glance you probably wouldn't know it, but Finn is a mighty hero. It’s true, he’s passionate about heroism. For a twelve-year-old human boy, saving princesses and battling sinister wizards is quite an admirable hobby. Finn doesn't know why he’s compelled to protect good from evil; it’s just something he knows he must do. Raised in the wild from infancy and knowing nothing of his real parents, perhaps he will someday learn the secrets of his mysterious past. But in the meantime… adventure awaits!

At the beginning of the television show Adventure Time Finn is a 12-year-old boy who is the only known human in the land of Ooo. During the episode Mystery Train it is his 13th birthday, Finn is currently 14 years old. Finn ages naturally in real time, aging during the show at a natural pace. The voice actor who plays Finn is aging as well resulting in a noticeably deeper voice.

Background

As shown in "Memories of a Boom Boom Mountain ," Finn appears to have been abandoned in the woods during infancy. He reveals that he made "boom boom" (Finn's word for defecation) on a large leaf, fell on it, and lay there crying until Joshua and Margaret (Jake's parents) rescued him from the wilderness to raise him alongside Jake, who becomes like a brother to him (as such, Jermaine is also Finn's adoptive brother). In "Memory of a Memory," a baby Finn is seen singing a song in the bathroom of what appears to be Joshua and Margaret's house. 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 knows nothing of his human parents or any other humans.