Vampire King

The Vampire King is an unnamed, deceased character only mentioned by Pendleton Ward. He does not appear in the series, nor is it known if he ever will. Pen stated that while Marceline is the Vampire Queen, there is no Vampire King because she killed him. Not much is known about this king or his death at present. He is not the same as Marshall Lee, since Marshall is a gender-swapped fictional character created by the Ice King.