• Marceline and her father are voiced by Olivia Olson and Martin Olson, who are actual father and daughter in
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    real life. Martin Olson is also a writer who was staff writer for Pen and Teller, Rocko's Modern Life, Camp Lazlo, and Phineas and Ferb.
  • He wears similar red boots as Marceline did in "Evicted!"
  • He is the boss in the game Sound Castle 2. Once you defeat him, you get a badge for doing so.
  • In "It Came from the Nightosphere," at the moment when he was sucking out Gunter's soul, you can see a little bit of his "monster form" head at the back of his throat. You can also see the head when he yawns in "Daddy's Little Monster."
  • According to writer Adam Muto, he is more of a demonic creature than a vampire.
  • His statue in the Nightosphere jail reads "Hunson Abadeer, our great leader, with us for eternity."
  • According to Jesse Moynihan, Marceline's dad's name is the name his brother gave their car when they were kids. Jesse was also in a band called Hunson Abadeer, but they only wrote one song.
  • In "It Came From The Nightosphere," the eyes of his monster form are green, but in the video shown in "Daddy's Little Monster," the eyes are red.
  • His full name was revealed in "Return to the Nightosphere."