Marceline and her father are voiced by Olivia Olson and Martin Olson, who are actual father and daughter in 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."
