Markula is the vampire owner of the Aqua Teen House and the landlord of the Aqua Teens. He is 4040 years old and had a hunchback, leathery green skin, and a way with spiders. He demands that the Aqua Teens pay for a broken gas pipe (which they refuse to do), and because of that he keeps trying to sell their house. Unlike most vampires Markula has shown signs of being able to survive out in the sunlight. Carl spilled garlic champagne on him, causing him to disintegrate.
He later reappeared in season 8 episode "Vampirus". His name and voice is loosely based on the monster Dracula from the movies and books although his appearance is more reflective of Nosferatu and old age vampires that predated Dracula.
He is mentioned indirectly in "Reedickyoulus".
He makes his last appearance in "The Greatest Story Ever Told."