Marceline

Marceline is one of the main characters in Adventure Time and the main protagonist of Stakes. Marceline is a fun-loving 1,000-year-old vampire queen. Unlike a traditional vampire, Marceline does not need to drink blood to survive; rather, she eats the color red. Marceline is also an avid musician who plays an electric bass that she made from her family's heirloom battle-axe. She is currently in a romantic relationship with Princess Bubblegum, something revealed to the audience during the episode "Come Along With Me".

History
Roughly a thousand years prior to the events of the series, Marceline was born to a demon lord named Hunson Abadeer and a human woman.[5] Abadeer is the ruler of the Nightosphere —a Hell-like demon dimension—and subsists on the souls of sentient beings. Marceline's earliest depicted childhood memory is of her living in a trailer with her human mother, who recounts to her the story of how she met her father.

Characteristics
Marceline is a half-human/half-demon, turned into a half-vampire/half-demon after being bitten, and the eponymous Vampire Queen, after having killed the previous Vampire King many years prior to the start of the show.; Although she is 1,000 years old, she takes on the physical appearance of a teenager to a young adult.

Unlike traditional Western vampires, Marceline subsists not off blood, but rather the color red (including "low-grade" shades such as pink).; When Marceline is deprived of red, she enters into a "feral" state, and will instinctively try to kill others and drink their blood.&lt;ref name=redstarved/&gt; Like traditional Western vampires, she is vulnerable to sunlight and is capable of turning into a bat of varying size.

Personality
Having spent centuries traversing the Land of Ooo, she has evolved into a "fearless daredevil",&lt;ref name=bio&gt;http://www.cartoonnetwork.com/tv_shows/adventuretime/characters/marceline/index.html&lt;/ref&gt; and her fondness for mischief has turned her into something of a trickster. Consequently, in her first role, Marceline functions as the antagonist of the story, forcing Finn and Jake from their home. However, she eventually becomes their close friend once Finn recognizes that she is "a radical dame who likes to play games".&lt;ref name="henchman"/&gt;

It is implied that some of her more malevolent traits are solely based on her vampire instincts. In "Red Starved", Marceline slowly becomes vicious and sinister after having been deprived of food, trying to tempt Jake so that she could eat him. In "Vamps About", Marceline was fine with Peppermint Butler creating weapons meant to kill her as a contingency, stating that she could have snapped and killed everyone at any given time.

She can also be sentimental. She was very emotionally attached to her teddy bear Hambo, which was given to her by Simon Petrikov; after Ash sold it to Maja, she was furious and broke up with him. Later, Princess Bubblegum got Hambo back in the episode "Sky Witch".

Marceline seems to be very emotional. For example, in "What Was Missing", she seemed to be more aggressive towards Princess Bubblegum than she usually is. She is also very independent, and in early episodes would often act without concern for Finn or his friends. It is easier for Marceline to express her feelings through music, as seen in the "Fry Song" and "I'm Just Your Problem," but has trouble expressing them otherwise. She keeps a diary that she uses for inspiration for songs as seen in "Marceline's Closet." When Marceline read the lyrics to "Remember You", the song that Simon Petrikov wrote for her, she began to cry.

Near the end of "The Dark Cloud", her personality changed slightly. Marceline had learned how to be more mature which is proved by her saying that she will be able to hang out with Princess Bubblegum "forever". She also said the learned how to be more empathetic to others too. Yet, it is still unknown if she got over her emptiness in the end.

Physical appearance
Marceline has light blue-gray skin, crooked fangs, and long, midnight black hair that reaches to her feet. She also sports two marks on her neck, which are the marks of the bite that turned her into a vampire. She also has a tongue that is forked sometimes and is also normal, like a human's, sometimes. her tongue looks normal. It might be part of her powers since she has shapeshifting powers, she may be able to make her tongue look forked or normal.