Finn the human (Real name: Finn Mertens), known as Finn to most characters is, along with Jake the Dog, a fictional character and one of the main cast of the American animated television series Adventure Time created by Pendleton Ward. He is voiced by Jeremy Shada in most appearances. The character made his debut in the original pilot, wherein he was named Pen and voiced by Zack Shada, Jeremy's older brother.The character has been met with largely positive critical reception.