Princess Bubblegum created the Earl of Lemongrab for the purpose of ruling the kingdom if she ever became unable to do so. However, being the first of her "experiments gone wrong," her creation is exceedingly temperamental and a terribly inexperienced ruler. Princess Bubblegum and the Earl of Lemongrab initially dislike each other, and Princess Bubblegum calls the Earl a "butt." According to Princess Bubblegum, "it's complicated." While in power, Lemongrab is intent on sending everyone, including Princess Bubblegum, to the dungeon for conflicting with his rigid agenda. However, when the Princess returns to the age of 18, she fires the Earl by shouting "Yo, Earl! Hey! You're fired, ya butt!" Princess Bubblegum is treated with the same rudeness, obnoxiousness, and sense of entitlement as Lemongrab treats everyone else. Although he does think of her as his creator, he also blames her for the difficulties in his life.
In "You Made Me," Princess Bubblegum is much kinder to Lemongrab when he articulates that he is lonely. This might be because she understands what causes his attitude and behavior. He refers to her as "his glob," which might mean that he acknowledges that she is his creator, similar to how a god creates something in religion. Although he is hostile and threatening towards her, and reacts with fear, she continues to help him and speak to him in a gentle, coaxing manner, and eventually makes him a Lemongrab clone to be his friend. By the end of the episode, the two Lemongrabs and Princess Bubblegum are on good terms. Princess Bubblegum says "Take care, boys!" to them, and they respond by requesting she visit them.
In "Mystery Dungeon," Lemongrab cries out "MOMMY!" as he has the life-juices squeezed out of him, in reference to Princess Bubblegum, indicating that he does see her as a parental figure. In "All Your Fault," the Lemongrabs refer to her as "Mother Princess" and "family." In the episode, she sees them as a frustrating nuisance, but is still willing to be kind to them and help them when they are in a tough situation. When Jake calls the Lemongrabs "selfish," Princess Bubblegum says, "Oh, no. Their hearts are fine. They're just like this," and they smile. In "Too Old, Princess Bubblegum shows concern and looks shocked when Lemongrab appears in front of her, and during dinner, she commented on how different he and Lemongrab 2 were.
Bubblegum created Lemongrab 2 to be with the Earl of Lemongrab in the episode "You Made Me." She created him just like she did the Earl of Lemongrab, and made them identical in appearance. Just like with the Earl of Lemongrab, Princess Bubblegum is like Lemongrab 2's mother.In "Too Old," she is surprised in the differences between the Earl and Lemongrab 2, with the Earl being very large and fat, and Lemongrab 2 having no legs, a large bite mark on his head, and relies on a hovering device to move. This is a result of what happened in "Another Five More Short Graybles."
Lady Rainicorn is Princess Bubblegum's best friend and trusty steed. Lady Rainicorn is one of four creatures she uses for transportation; the others are her swan, Jelly Horse, and the Morrow. She and Princess Bubblegum appear to be very close, similar to Finn and Jake. Princess Bubblegum understands Korean (Lady Rainicorn's first language), though she hasn't been heard speaking it in the series, conversing in English to Lady Rainicorn in "Video Makers" and "Lady & Peebles." In "Lady & Peebles," Princess Bubblegum shows to be completely loyal to Lady Rainicorn, refusing to give up on her, even when she was injured. It is also the case that Princess Bubblegum was the first to find out that Lady Rainicorn was pregnant.
Princess Bubblegum was the former crush of Finn, although it wasn't clear whether or not the feeling was mutual. She often rolled her eyes at his advances, but at other times seemed genuinely flattered, having kissed him numerous times from the animated short until "Wizard Battle." Princess Bubblegum cites the hero as a great friend and will never hesitate to call on him for aid in royal matters. She has referred to him as "my hero" on several occasions. Finn and Princess Bubblegum share the same moralistic nature and often work together to right any wrongs in the Land of Ooo.
Finn has a few nicknames for her, such as PB, Princess, Bubblegum, Probbles, Preebos, P-bubs, Prubs, and Peebles.
In "Slumber Party Panic" she called Finn "adorable." The princess also sees Finn as her "flawless champion," as said in "The Duke." It is also shown that there is a picture of Finn on her wall. In the same episode Princess Bubblegum reveals she could never hold a grudge against Finn. In "To Cut a Woman's Hair," she says explicitly that she likes Finn, although she could have meant as a friend or in a motherly way. In "The Real You," she gives Finn a kiss on the cheek for saving the Candy Kingdom from the black hole he created and making her Science Barbecue a huge success. In "Go With Me," she exiles Finn from the Candy Kingdom after he releases a pack of wolves into her room, but her anger proves temporary as Princess Bubblegum appears to have forgiven Finn by her next appearance.
In "Mortal Folly" she told Finn "I care about you," then giving him a pink sweater with a white heart stitch to the left that she made with the power of "liking someone a lot." This proved essential in helping Finn defeat the Lich. At the end of "Mortal Recoil," Princess Bubblegum ages down to 13, which led to the events of "Too Young."
In the episode, Princess Bubblegum acts very loving and affectionate toward Finn during the time she is 13, even going on a "date" with him, leaning on his shoulder, and holding his hand. Finn's former feelings for her appear reciprocated while she was 13, and this may indicate Bubblegum's true feelings for him have always been of love, or this might only apply when they are the same age. She expresses some regret when she has to turn back to 18 because she never gets to "act like a kid." She also says to Finn that she would rather "stay like this, with you." During her transformation back to 18, they share a hug and she kisses Finn on the lips. When she has changed back to 18, she returns to her usual personality, no longer demonstrating romantic affection for Finn. When Finn asks whether they could "hug some more," she replies by saying "That was like 5 years ago... You really gotta move on!" She makes this remark with a smile and then mutters "Such a silly boy" as she walks back into the castle.
In "Wizard Battle," she forgives Finn for cheating in the contest, then they share a quick kiss on the lips (their final real kiss together; she has not kissed anybody else to date), after which she slaps him on the cheek for cheating.
In "What Was Missing," it was revealed that Finn keeps the clump of Princess Bubblegum's hair that he got in "To Cut A Woman's Hair" as a prized possession. It was also seen in "Incendium" while Finn was singing "All Gummed Up Inside" and again when he saves Flame Princess from falling.
In "Incendium," Jake says that Princess Bubblegum is too old for him. This age gap might also be the only reason she keeps pushing him away, as when she turned thirteen she showed romantic affection to Finn.
In "In Your Footsteps," Jake refers to Princess Bubblegum as Finn's "ex-girlfriend," to which Finn responds "She's not my... We never went steady."
In "Burning Low," Princess Bubblegum becomes pleasantly interested when the news comes up that Finn is hanging out with another girl, but then she acts distraught when she finds out Finn has been hanging with Flame Princess. She attempts to explain to Finn and Jake why he shouldn't date her through complicated scientific facts, though Finn leaves to meet Flame Princess and Jake falls asleep. Jake comes to the conclusion that Princess Bubblegum is jealous of Flame Princess and shares this with Finn. She confronts Finn the next day and attempts to console him, believing that he knew about the situation. However, when she starts talking about responsibility demanding sacrifice, Finn misinterprets this as her displaying jealousy for his relationship and shouts to her about his past feelings towards her. She finally tells Jake that she was the one who had Flame Princess locked up so she does not fall in love and destroy the Earth from the inside.
Her advice of "responsibility demands sacrifice," indicates that sometimes, when one loves someone enough to kiss them, one may have to sacrifice the chance to do so because the greater good demands one do so. She applies this principle to Finn kissing Flame Princess, which could cause the destruction of the planet. Finn however, takes this the wrong way. She watches sadly when Finn and Flame Princess continue their relationship. Though her reasons are not yet determined, Jake took them as a sign of a jealousy, to which she quickly replied to him to "shut up."
In "Lady & Peebles" she struggles to find Finn and Jake, finds out that they were both captured by Ricardio, saves them and treats them back in the Candy Kingdom.
In "You Made Me," Lemongrab attempts to hit Princess Bubblegum with a blast from his sound sword, but Finn dives in front of her and takes the hit instead.
In "Reign of Gunters," although Finn says he is over Princess Bubblegum, he takes the advice of a dating book called Mind Games and tries to act more mysterious. He claims he needs to keep all the ladies in a state of confusion; that way, he has "options in case Flame Princess doesn't work out."
In "King Worm" he dreams of Princess Bubblegum being his wife, and in "All the Little People" he induces little Princess Bubblegum to massage little Finn's shoulders and kiss him several times.
In "The Lich," Princess Bubblegum becomes angered when Finn tries to take her royal gem from her crown and starts struggling to push him away, causing her to accidentally cut him on the cheek with scissors. Finn staggers backwards and hisses in pain, glaring angrily at the Princess before taking the gem from the fallen crown and leaving through the roof with Jake despite Princess Bubblegum's calls and her saying that it was an accident. However, subsequent episodes indicate that they are on friendly terms again.
In "Too Old," after Flame Princess breaks up with Finn over the events of "Frost & Fire," he tries to rekindle romance with Princess Bubblegum, who rebukes him, saying: "Finn, I have citizens who need me. I can't always treat everything like a little boy game." At the end of the episode, Finn realizes that "maybe age isn't just a number. Maybe older people, like, really are different.... I think I really sponked up."
Princess Bubblegum and Jake have a rather strange relationship, with Jake being well aware of Finn's former crush on her. Despite this, they seem to maintain a healthy friendship with Princess Bubblegum, even calling Jake "puppy" and allowing him to rest his head on her lap in "Incendium." It was revealed in "Mortal Recoil" by Jake that Princess Bubblegum likes it when Jake plays songs.
Even though they are good friends, in "Princess Cookie," Princess Bubblegum wanted her guards to arrest Jake after he helped Baby-Snaps, and in that same episode Jake pretended he hated her because she made him be a milkman instead of a mailman, as he went undercover to stop Baby-Snaps.
In "Burning Low," Princess Bubblegum seemed content to speak with Jake about the possibility of Finn having a girlfriend. When Jake becomes under the impression that Princess Bubblegum is jealous, he becomes angry with her for hurting Finn and threw a box at her, saying "You're sick!" However, when the princess clears up the misunderstanding, Jake is more than willing to help. At the end of the episode, Jake teases Princess Bubblegum by calling her "jealous," to which she responds with a deadpan "Shut up."
In "A Glitch is a Glitch," Princess Bubblegum makes a hand face with bumps on the side of her palm which she uses to kiss Jake's similarly morphed elbow with.
In "Too Old," Princess Bubblegum tells Finn that it was a shame Jake didn't come because she loves him.
Lumpy Space PrincessEdit
Lumpy Space Princess is one of Princess Bubblegum's best friends. Despite their drastically different personalities, the two are often together and Lumpy Space Princess is a frequent visitor to the Candy Kingdom during many of its parties and ceremonies.
Princess Bubblegum and Shoko grew close in the episode "The Vault." Shoko originally only befriended Princess Bubblegum because she wanted to gain her trust so that she could steal the amulet. However, after the princess gifted Shoko with an artificial arm to replace the one she lost, the thief began to regret having to steal from her new friend. Knowing that the penalty was death if she failed to steal the amulet, Shoko went ahead and tried to take it while PB was sleeping, but was busted by Gumball Guardians. At the end of the episode, Shoko has the amulet returned to PB (via Finn), and there seem to be no hostile feelings between the two.
Cinnamon BunEditPrincess Bubble gum loves all of her candy citizens. However, Cinnamon Bun seems to be unlike any of the others to her. He seems to be slightly ignorant to even the simplest of tasks, but Princess Bubblegum still seems to respect the odd ways in which he lives his life. She even allows him to keep a fake pet in "Earth & Water," and allows him to have a real one later on in the episode. She seems quite stern, even motherly, when necessary, though. However, the two always seem to make up and are back to normal in the end.
GeneEditWhen Gene reversed the directions for everyone in the Candy Kingdom, Princess Bubblegum was enraged with him and demanded that he fix it. Although he does eventually revert the kingdom to how it was, Gene still refers to PB as the "anti-fun" and does not get along with her well. She often claims (correctly) that some of his antics are dangerous, and has feared for Finn's safety when he is near Gene.
After Gene moved in with Finn and Jake, Princess Bubblegum's anxiousness reached a boiling point, so Finn suggested the two hang out for a day. After Gene showed knowledge for science and revealed he's just trying to have fun, Bubblegum lightened up to him a slight bit, but is still cautious about his antics. Also on the same date Gene saved PB from Ice King, they made it also clear to just be friends and don't want to be in a relationship in any way.
Elf PrinceEditAfter Finn got into a relationship with Flame Princess, Princess Bubblegum decided that it should be fine if she also went into a relationship by now. Princess Bubblegum met a prince from the Elf Kingdom, the Elf Prince. After some time they got married in the episode "Shiver Me Timber." When Princess Bubblegum discovered she had feelings for Marceline they decided to divorce, hiding the fact she was in love with Marceline, later in the episode "Divorced." They still are on friendly terms now however, and Elf Prince also had moved on.
Ricardio seemed to have common interests as Bubblegum and they became friends very quickly. They are seen dancing together and preparing to perform scientific experiments. However, at the end of the "Ricardio the Heart Guy," it's revealed that Ricardio is Ice King's sentient heart who wishes to bring Bubblegum's heart to life and marry it. Princess Bubblegum was tied to a chair and was held hostage by Ricardio. However, he was beaten up by Finn and Jake and was returned back into Ice King's body.
The two meet again in "Lady & Peebles," where Ricardio escapes, builds himself a body out of Ice King's flesh and poisons Finn and Jake to lure Bubblegum into a cave in the Ice Kingdom. When she finally came, he reveals that this time he wants to marry Bubblegum herself. Bubblegum agrees to marry him if he could defeat her in a hand to hand combat. Since his sinews were weakly attached, she easily tears his limbs apart and defeats him, leaving him in a bad condition.
Duke of NutsEdit
Princess Bubblegum is shown to have an outright hatred for the Duke of Nuts because he eats all of the Royal Pudding. In the episode "The Duke," he explains to the princess that it is due to a medical condition; his pudding deficiency causes him to lose control and eat all of the pudding. Princess Bubblegum tells him that all is forgiven, but reveals to Finn that she still does not trust the duke.
Dark Princess and Princess Bubblegum aren't on exactly good terms with each other. Because Princess Bubblegum is a precious someone for Marceline means that Princess Bubblegum is a target for Dark Princess. In "Sweet Revenge" she discovered that she likes to torture the princess, psychically and mentally. Since then Princess Bubblegum has a hatred for Dark Princess because she wanted to eliminate her girlfriend. She tries to find a way to make the Unknown Lands into a prison so Dark Princess won't be able to escape, and so that all the other enemies of the kingdom can be thrown in there too.
In the original pitch documents, Princess Bubblegum and Marceline are shown to be friendly rivals. Though appearing at the same place at the same time on several occasions, the nature of their relationship was not known until "Go With Me," where we see Marceline mockingly greeting Princess Bubblegum, much to her displeasure. Marceline is the first and only character to call Princess Bubblegum by her first name (Bonnibel) and usually shortens it to Bonnie.
Marceline appears to view Princess Bubblegum as boring and a snob, while Princess Bubblegum, generally a woman of grace and poise, views her as unrefined and rude. In "What Was Missing," when Princess Bubblegum miscalculates the music needed to open the door, Marceline says, "Looks like you aren't as perfect as you thought! Guess you can't judge me anymore." Princess Bubblegum angrily replies, "I never said you had to be perfect!" hinting that whatever previous relationship the two had had ended on bad terms. However, in the same episode it is revealed that the item stolen from Princess Bubblegum was a t-shirt Marceline had given her, which she confesses she values deeply and wears it as pajamas.
In the episode "All the Little People," Princess Bubblegum's and Marceline's mini-selves approach each other and wave.
In the episode "Sky Witch," Princess Bubblegum is shown sleeping in the shirt that Marceline gave her, and, when she wakes up, she smells the shirt deeply, before wearing it under her clothes. A picture of Bubblegum and Marceline is also shown hanging in Bubblegum's closet, revealing that she still considers Marceline a friend. Later on in the episode, Marceline visits Princess Bubblegum at the castle, pushing a Gumball Guardian out of the way, entering the windows, and closing the curtains without the Guardian complaining or otherwise reacting at all. Marceline expresses that she wants the Princess's help to find Maja the Sky Witch. Bubblegum agrees to help her, and treats her with notable friendship when trying to get her to relax through Maja's bramble barrier, but the Princess is annoyed to discover that Marceline is simply looking for her old toy, Hambo. However, after realizing how much Hambo truly means to Marceline, Bubblegum agrees to continue helping her search for it, despite the danger of Maja. Eventually, Princess Bubblegum barters for Hambo by offering Maja the T-shirt that Marceline gave her, an object that Maja notes has "sentimental freshness" and "psychic resonance" greater than Hambo's. It is not clear what balance of importance Maja places on overall sentimental value versus the recency ("freshness") of the feelings, but the latter seems important. Bubblegum chooses not to tell Marceline how she got Hambo back, stating only "I took care of it," and climbs onto Marceline's back so they can fly out of Maja's home.
It was later revealed in the episode "Stakes of Gum" that Princess Bubblegum and Marceline do have feelings for each other. Bonnibel came to watch Marceline's concert because she loves her music, Marceline invited her backstage. When Marceline sung an extended version of I'm Just Your Problem and Oh, Bubblegum, Bonnibel realised that Marceline also had feelings for her and they started a secret relationship.
In "Couple Night" they finally revealed their relationship to the others after the whole couple night had become a disaster. In "Garlic and Peanut Butter" Marceline took the step to introduce Bonnibel to her father. At first Hunson didn't approve of the relationship which caused trouble for both girls. Hunson eventually approved and they could be open about their relation. Their love for each other was shown again in "Sweet Revenge" in which Princess Bubblegum gets kidnapped by Dark Princess, but luckily gets saved by Marceline. PB in favor tries to find a way to make the Unknown Lands a dungeon.
Princess Bubblegum and Marceline's friendship is further explored in the comic Adventure Time: Marceline and the Scream Queens Issue 1, in which Bubblegum becomes the manager of Marceline's band. However, the comics are not considered canon to the series.
Ice King spends a great deal of his time obsessing over capturing princesses. His most targeted princess is Bubblegum, who is annoyed with the Ice King's actions but generally seems to put up with them. One of the few times that Bubblegum shows particular anger towards Ice King is in the episode "What Have You Done?" When Ice King's attempt at a kind gesture (making it snow) ends up making nearly the entire kingdom sick. When the Ice King selfishly neglects to acknowledge Princess Bubblegum's purpose in asking him to help, she becomes frustrated with him, ultimately forcing Princess Bubblegum to order Finn and Jake to capture the Ice King at all costs without telling them why she wants him imprisoned.
In "Mortal Folly," Ice King's obsession with Bubblegum nearly leads to the destruction of Ooo. As Finn is fighting the Lich, the Ice King captures her, intending to marry her. After the Lich is defeated, Ice King accidentally drops the princess into the Well of Power, corrupting her. However, he is still loyal enough towards her to help save her life after her broken body was possessed by the Lich to destroy Ooo.
Regardless of Princess Bubblegum's feelings on the situation, the Ice King really does care for her. Ice King cries hysterically when she is hospitalized in the episode. By the end of "Mortal Recoil," Ice King becomes uninterested in her when she became underage. Once Princess Bubblegum is revealed to have turned thirteen, he says, "Ah, dang it! Well, I'm out of here. Goodbye, everyone!" and leaves through the window. Since her return to the age of 18, he is once again interested, as seen in "Wizard Battle."
Despite the awkward nature of their relationship, they are capable of being civil and even hanging out. This is shown in the ending of "Holly Jolly Secrets Part II" when the Ice King and Princess Bubblegum sat next to each other drinking hot cocoa. Although the Ice King was annoyed by Princess Bubblegum also being close to Finn, she didn't seem to mind the Ice King being so near her. This indicates that perhaps he has learned some restraint, and Princess Bubblegum does not dislike his company as much as she used to.
She likely still strongly dislikes the Ice King after he stole part of her head in "Princess Monster Wife." However, she describes the Ice King, in "Lady & Peebles," as not usually being "a serious threat." She saves the Ice King at the end of the episode, giving him a new heart after she defeated Ricardio. She didn't appear to show malice towards him, and said "please" before asking him to stop being annoying and to leave.
In "A Glitch is a Glitch," Ice King "reminds" Princess Bubblegum about how she had told him that she would go on a date with him if he was that last person in Ooo, but she replies by saying that she never really said that. Later, she tells the Ice King that even if she actually said that, he still would not be the only person in Ooo because she is still there and starts making out with her own hand, showing she'd rather be in love with herself than with Ice King and that she still has a strong distaste for him.
In "Princess Potluck," she invited him to the Princess Potluck, but Ice King didn't know because he never read the invite.
The Ice King officially gives up on Princess Bubblegum in "The Party's Over, Isla de Señorita." When he tried to kidnap Princess Bubblegum again, Ice King realized, based on her reactions, that she did not actually love him, and traveled far out to Ooo to start somewhere "fresh." Ice King describes to the Island Lady his relationship with Princess Bubblegum, though there actually isn't, and connected with her relationship with the Party God through this. Ice King goes far as being irritated at her at the end of the episode, something which has not happened before in the series.
In "Burning Low," Princess Bubblegum reveals that she had Flame King contain his daughter, Flame Princess, in a lantern because she is physically unstable; if she were to experience extreme romance she could cause a catastrophic meltdown of the planet. Princess Bubblegum seems to be okay with Finn having a relationship with her, although she feels sorry for them both.
In "Earth & Water," she was "observing" Flame Princess's elemental matrix. She explains to Flame Princess that she was a threat, and that if she could create a scientific model that described her complete elemental matrix, she could isolate and suppress her violent feelings, which Flame Princess agrees to. She then leaves her with Cinnamon Bun in order to help Finn and Jake. During Flame Princess' flashback when she was a baby, it was revealed that the true reason why she was locked up in the lantern was that when she was a baby, Flame King denies her as his daughter and sent her into the woods to perish. However, the Flame Messenger took pity on her and left her with a Crystal Lumberjack, whose house was burnt by Flame Princess. She runs into a nearby forest and burnt down trees while running around like a fireball. Princess Bubblegum sees this and returns her to the Fire Kingdom. She tells the Flame King that he should not let her wander in the woods as she was too dangerous and advices him to lock her up into a lantern. After discovering that Flame Princess has become the new ruler of the Fire Kingdom, Princess Bubblegum accepts it and leaves Cinnamon Bun in Flame Princess's hands.
In "The Suitor," Princess Bubblegum meets one of her many admirers, Braco. However, she refuses to date him (or spend any time with him, aside from experimental purposes), explaining that he only had an infatuation with her. Princess Bubblegum invents a robot copy of herself, P-bot, to act as his wife. Braco tells her that it feels wrong, but P-bot kisses him and, satisfied with P-bot, Braco takes her and thanks Princess Bubblegum before jumping out of the window with his new wife. Princess Bubblegum then stares at them as they leave and quietly says "You're welcome, my love." However, it's unknown if she said it out of true emotion or due to the spell placed on Ogdoad.
In "Mortal Recoil," Raggedy Princess is one of the guests in Princess Bubblegum's hospital room, showing that she cares about the princess's well-being. However, in "Sky Witch" Princess Bubblegum expresses distaste for Raggedy Princess's general behavior, saying that Raggedy Princess has "zero self-respect." In the same episode, Princess Bubblegum acknowledges Raggedy Princess's sewing talent and seems impressed and sure of herself when she describes it to Marceline.