Hunson Abadeer

Hunson Abadeer (a.k.a. the Lord of Evil), is Marceline's father and ruler of the Nightosphere.

In "It Came from the Nightosphere," he is freed from the Nightosphere by Finn, who believed that Marceline and her father should be together. Abadeer initially shared a shaky parent-to-teen relationship with Marceline that involved an evil rampage throughout Ooo, sucking the souls of many creatures such as the Fuzzy Friends, the Marauders, Hot Dog Princess, numerous ants, most of the penguins in the Ice Kingdom, and some Tree People. He was ultimately defeated by Finn, who released all of the captured souls and sealed the deathless being back into the Nightosphere. Abadeer managed to reaffirm his love for Marceline just before leaving. He probably has not been out of the Nightosphere for some time because when he finds out that Marceline turned the family axe into a guitar he asks, "Did you turn it into some kind of a lute?"

He appears briefly in "Memory of a Memory," in which he is seen eating his daughter's fries (which he later says were cold in the episode "It Came From The Nightosphere"). The incident that caused a rift in their relationship and led to Marceline writing her "Fry Song."

He reappears in "Daddy's Little Monster," trying to trick Marceline into taking over the Nightosphere.

Personality
He claims to be "completely evil" and is shown to be extremely rational, as well as cold and calculating (these are later shown to be effects of the Nightosphere Amulet). He also shows care for things he deems evil; on the animatic, it shows that he is commenting and observing how Gunter is the "...most evil thing [he] has encountered" and apparently asking for Gunter's soul before Gunter hits him in the face. Gunter, the Ice King, Marceline, Jake, and Finn were the only souls that were spared during his rampage. However, he is not completely emotionless, as he is apparently moved by hearing his daughter's song. He also confirmed that he loves Marceline, and that he was deeply sorry he ate her fries, never meaning to hurt her. This also seems to have changed his personality, as even with the Nightosphere Amulet on, he is far less evil than before, implying that this was a result of the fry argument he and Marceline had. He also seems to have a sense of humor in which he threatens the Marauders in the form of a joke and plays along with their leader's response, calling himself their "Mama." He is also heard singing a song about "sucking up souls and steppin' on ants," though these attributes are not present in Daddy's Little Monster.

Appearance
He is first shown exiting the Nightosphere as a mass of tentacles, eyeballs, intestines, and various other like appendages. But his usual form consists of a vampire-like humanoid with a light blue skin tone, pointy ears, flat dark blue hair, a dark business suit and light yellow eyes with neon pink pupils. His movements are occasionally jerky and unnatural, moving with what appears to be additional or especially stiff but flexible joints. He has the ability to shapeshift, like his daughter, and has been seen with a second, monstrous head with a vertical mouth that usually hides inside his normal mouth (most likely part of his true form). Though when he transforms into a large monster this monster head emerges and replaces his normal head. He wears a pair of red boots just like Marceline. However, without the Nightosphere Amulet, he sports a white shirt, a pair of green-striped pink boxers, and has a slightly bulging belly that is hidden when he is wearing his suit.

Abilities
Hunson Abadeer is "deathless," apparently meaning that he is immortal. He is capable of stealing souls, shapeshifting, regenerating, and growing to tremendous sizes. He is very strong and flexible so his body can bend many ways making him extremely good at fighting. An example of this is his ability to swing his leg behind his head, kicking people in the face who try to attack him from behind; he calls it Karate Kick.

In the episode "Daddy's Little Monster," it is revealed that Hunson's powers originate from his Nightosphere Amulet, which fills its wearers with chaotic evil.

Marceline
Hunson is Marceline's father, though it is not explicitly stated whether he is her biological father or the being who turned her into a vampire. For some time, Marceline loved her father. Marceline became upset when he ate her fries, and feels that he doesn't care about her. He would eventually be imprisoned in the Nightosphere and Marceline wouldn't talk to him until the episode "It Came from the Nightosphere."

After coming out of the Nightosphere, she had an argument with him after he took her Axe-Bass away. Eventually, he realized Marceline's feelings toward him when he listened to the song about their relationship. Toward the end of the episode, they had a talk which fixed the problems between them, but was interrupted when Finn sent him back to the Nightosphere.

Hunson, however, wishes Marceline to take over the Nightosphere in "Return to the Nightosphere" to make him proud. But realizes his fault, and admits that he is proud of Marceline for who she is. In this episode, it also shows that Hunson uses the term baby as endearment for Marceline. His relationship with his daughter also seems to have a powerful influence over his personality, as he acts completely evil in his debut due to possible bitterness from their previous argument but after hearing Marceline's song, he acts much nicer afterwards in his later appearances. As an additional result from this Marceline now visits her father while he is in the Nightosphere.

Finn
Finn freed Marceline's father from the Nightosphere so that Marceline could have closure with him. The Lord of Evil was under the impression that Finn was Marceline's "evil servant" but, upon learning that Finn is "super good," quickly attempted to steal Finn's soul. The Lord of Evil then took Marceline's guitar and, using it as a battle axe, stole souls throughout the Land of Ooo. When Marceline's father came to his senses, Finn was able to lock him back in the Nightosphere.

Despite this, in "Daddy's Little Monster," he thinks Finn is cool and doesn't want any hard feelings between them. He showed it when he said "See how I'm not killing you." He even said that he thought Finn and Jake's Political Rap song, Demon Apathy was "Pretty great!" but this may also be flattery to prevent Marceline from being too irritated at him. He also thinks Marceline's friends (Finn and Jake) "...are alright," showing subtle respect towards the two.

Jake
Jake is probably scared of Hunson Abadeer because of his fear of vampires. but in the episode "Return to the Nightosphere" he seems pretty calm around him while he video tapes Hunson.

Gunter
When he confronted Gunter, Marceline's father said Gunter was the "most evil thing he had ever encountered." They had an argument and Marceline's father tried to steal Gunter's soul. However, Gunter slapped him in the face and Marceline's father decided not to suck Gunter's soul.

Ice King
When the Ice King was looking for "who told Gunter he could fly," he confronted the Lord of Evil. He scared the Ice King with his monstrous form, causing the Ice King to soil himself "completely by choice" and fly away.

Peppermint Butler
Although they have never interacted on screen, there seems to be friendly history with Peppermint Butler. If looked at closely in the episode Return to the Nightosphere, there is a picture of them playing golf together.

Major

 * "It Came from the Nightosphere"
 * "Daddy's Little Monster"

Minor

 * "Memory of a Memory"
 * "Return to the Nightosphere"

Quotes
See Hunson Abadeer/Quotes

Trivia

 * 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 Penn 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 Gunther'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."