Finn the Human or Finn Mertens is Jake the Dog's adopted brother and one of the main heroes of the Adventure Time cartoon series. Finn was for a long time considered the only confirmed human in the Land of Ooo to the point where he even got an epithet The Human attached to him. Lady Raicorn's dad believed that humans were extinct. And the fact that Finn never saw another human makes him sad and soul-searchy to the point of his life where he encounters Susan Strong from a mutant tribe called Hyoomans. But those worries never overwhelmed fun-loving human Finn, as he with Jake always found a way for some fun action and dancing. They even go to the snow slope for some belly spides. A fanart Adventure Time progress bar for YouTube with Finn Belly Slide.