Princess Bubblegum and Marceline the Vampire Queen were attending to Triston's Birthday Party in the Land of Ooo. While they were in the bathroom, Princess Bubblegum got dressed and ready for the party, Marceline got dressed as well... except she was not wearing any pants or panties
Princess Bubblegum: concerned Marceline?
Marceline: she looked at Princess Bubblegum Yes?
Princess Bubblegum: You forgot something to cover up your vagina and ass.
While Princess Bubblegum is typically kind, good-hearted and well-mannered, she can be very temperamental and has shown a malicious aspect of her personality whenever she is crossed. She was willing to break into and search the King of Ooo's blimp for evidence to support her suspicions against him, believing him to be a fraud, and went as far as to arrest him and several others in an effort to silence him; however she released them within an hour after seeing the love between Tree Trunks and Mr. Pig. She also displays a non-hesitant willingness to torture Ice King after he unintentionally infects the Candy Kingdom with a Freezer Burn Flu and refuses to assist her in curing them by screaming voluntarily. However, in this case, she does understand what she was attempting to do was wrong, and cries in stress and guilt when Finn exposes this. Even with her kind disposition, her moral code is not as strict as Finn's and there are also hints of a darker aspect of her personality. For example, she was shown randomly cutting the limbs off of tiny round creatures with scissors and reattaching them in different places when Finn sneaks in, although the creatures show no pain and seem perfectly happy to be reconfigured. Princess Bubblegum was also willing to resort to sabotage and forced sacrifice in order to survive. Her humor is also morbid and inappropriate at times, such as when Finn picks up a paralysis poison and she says, "That's paralyzing potion, Finn! Don't touch it, or it'll paralyze you forever!" and then giggles. There were also skeletons cuffed to the walls in a hidden chamber of her castle. Bubblegum also adores the people of her kingdom and puts their safety above all else. In her dedication, she sometimes drives herself to exhaustion with her tasks. She is also a rational thinker with skepticism towards magic, labeling it as "scientific principles presented like mystical hoodoo." She also claims that "all magic is science," and Wizards just don't know what they're doing so they call it magic. She seems to regularly organize and attend events and showpieces such as scientific conferences, parties, and talent shows. Noteworthy is one of Bubblegum’s coping mechanisms under extreme stress (like the Lich’s return) which seems to be stress-eating. When she regressed to being 13-years-old, she exhibits a playful attitude and a willingness to perform pranks with Finn. Just before Princess Bubblegum is returned to her normal age she mentions that she enjoyed temporarily being 13 because she was free from the responsibilities that came with being ruler of the Candy Kingdom and that she could act like a kid again. In Princess Bubblegum's own words, being thirteen was "bloobalooby," while being 18 was "plop-dumps and waggle-sags." After the events surrounding her age regression, Bubblegum began to feel very vulnerable, and, as she considers the possibility of living forever not yet scientifically possible, she makes a clone-Sphinx of herself named Goliad. She also begins exhibiting strong authoritarian behavior, as she starts spying on all her subjects, and begins taking more assertive actions from then onwards, with Tree Trunks even going so far as to label her "fascist." Furthermore, her worry about the fate of the Candy Kingdom in the event of her demise has led her to perform questionable acts and become more of a pragmatic character; evident in her consistent surveillance on anything that could be a threat (e.g. Flame Princess). Despite the moral ambiguity of her actions, they are motivated by her desire to protect, if taken to potentially paranoid levels. This could be best seen when Flame Princess called her a 'bad person' for her actions and Princess Bubblegum was visibly hurt, showing that she hadn't intended to be malicious. Nevertheless, even if her morality often becomes misguided and her methods bordering on dictatorship, Bubblegum truly desires only to protect her people and friends, born from a passionate heart of a girl that needed to learn herself how to be an adult. The ruler of the Candy Kingdom has to organize a thousand things at once, keeping a reliant and stable head at all times, lock down her own problems and struggles, whilst planning for the future protection of her people. Needless to say, none of this should be handled alone regardless of how mature or mentally strong the individual is. In addition to this, Bubblegum as a high-intellectual views things from a scientific or theoretical standpoint and structure things step by step. However, this often acts as a double-edged sword and complicates with the “perfection” role she has to fill already. If some unforeseen factor or miscalculation interrupts with her tightly detailed plans, she can be taken back for a moment and her insecurity reaches highest capacity. Certain examples are when she made an error at her attempt in opening the musical door in What Was Missing, failing in containing the Larvo threat twice or holding Varmints at bay. In Obsidian, the people she tried to help doubted her abilities and it was shown that even she falls subject to pressure from others. Juggling all of this simultaneously eventually manages to tear PB’s resilience. A famous example is the emotional breaking point Bubblegum reached in Varmints, where having lost the faith of her people, exiling from her home and losing her crown in an election boil up and overheat internally. PB finally starts to shed tears of sheer struggle, exhaustion and realisation that she cannot manage her dilemma and be OK. Fortunately, with the newly rekindled love and support from Marceline, Bubblegum can stop managing every disaster by herself and takes a break from the responsibility she's had since building the first Candy People. Having spent centuries traversing the Land of Ooo, Marceline has evolved into a "fearless daredevil", and her fondness for mischief has turned her into something of a trickster. Consequently, in her first role, she 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 is "a radical dame who likes to play games". 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. Marceline is very independent, and in early episodes would often act without concern for Finn or his friends. However, she can be very emotional and sentimental. For example, in "What Was Missing", she was more aggressive towards Princess Bubblegum than she usually is. She was 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", but Marceline was willing to give up Hambo in order to help Simon reconnect with his fiancée, Betty Grof.. 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 sang the words to "Remember You", from the letter that Simon Petrikov wrote for her, she began to cry. Near the end of "The Dark Cloud", Marceline's personality changed slightly. She had learned how to be more mature which is proved by her accepting her immortality, by stating that she will be able to hang out with Princess Bubblegum forever. She also learned how to be more empathetic to others too. However, it is still unknown if she got over her emptiness in the end. In "Obsidian", which takes place several years after the series finale, Marceline has grown to be a much more emotionally mature person, while still retaining her playfulness.
The Land of Ooo