|"Finn, What the Cabage!"|
|Appears in||Lawl with Garterbelt 3 (DLC)|
|Friends||Finn and Jake|
The Ice King
|Lawl Team||Team Garterbelt
Princess Bonnibel Bubblegum is the beloved ruler of the Candy Kingdom. Though not much is said about her past, there are some allusions to her relatives (e.g. Uncle Gumbald, mentioned in "Susan Strong"). It is implied that Finn has saved Princess Bubblegum many times, though she winds up saving him in the episodes "Dungeon" and "Lady & Peebles." It also seems that she has had previous run-ins with Marceline, the vampire queen. In the past she created Lemongrab (the first one of her experiments gone wrong), then sent him away to live a sheltered life inside his own castle. Princess Bubblegum also performs other science experiments which vary from very successful to catastrophic.
In the second season's two-part finale, "Mortal Folly" and "Mortal Recoil," she sends Finn and Jake on a quest to stop the Lich from killing everyone in the Land of Ooo. She gives Finn the Gauntlet of the Hero Billy, as it is the only known weapon that can harm the Lich, and a sweater she made herself. The Ice King captures Princess Bubblegum and chases after Finn and Jake to get their blessing to marry her, but he accidentally drops the princess into a pit of green liquid. She is soon melted into a pile of pink-brown candy goo, and is rushed to the hospital.
It is soon revealed that the spirit of the Lich has possessed the princess and eventually warps her into a giant monster that nearly tears apart the Candy Kingdom. Finn enlists the power of Ice King to immobilize her with a very freezing ice. Unfortunately, the frozen princess topples over and shatters to pieces. The doctors reassemble her but lack all the necessary pieces to put her back together, reducing her age to 13 (the same age as Finn at the time). According to Adam Muto, her body was composed of only enough reclaimed biomass to be an adolescent, and therefore she turned into one.
As a 13-year-old, Princess Bubblegum is technically younger than the Earl of Lemongrab and he claims his right to the throne until she turns 18 again. After failed attempts of pranking the Earl until he leaves, Princess Bubblegum is forced to restore herself to her 18-year-old form with the contribution of biomass (candy) from the Candy People and a hug (and kiss) from Finn. After reverting to her proper age and size in "Too Young," she jokingly acts as if the events that happened earlier that same day (while she was 13) actually happened five years ago.
In "Burning Low," Princess Bubblegum reveals that Flame Princess is physically unstable, and she prevents Flame Princess's Elemental Matrix from causing the end of the world: she guides Jake to block the hole resulting from the kiss between Finn and Flame Princess, thus cutting off Flame Princess's oxygen supply and stopping the reaction (and nearly suffocating her along with Finn, who had jumped down after her).
During the events of "Lady & Peebles," Princess Bubblegum and Lady Rainicorn track the missing Finn and Jake into an uncharted ice cave, with the belief that Ice King has captured them. After surviving dangerous encounters within the dungeon's environment, it is revealed that Ricardio set up the situation to lure Bubblegum into the cave and force her to marry him, tying Lady Rainicorn into a knot and having already poisoned Finn and Jake with Zanoits. Princess Bubblegum challenges him to a fist fight and defeats him by ripping his newly attached limbs away at their exposed sinews. She then drags Finn, Jake and Ice King back to the Candy Kingdom on Lady's back, creating a new heart for Ice King out of "Ricardio's sinews, toffee and maracas." She is also the first person to learn of Lady Rainicorn's pregnancy with Jake Puppies.
Princess Bubblegum patches up her rocky relationship with Lemongrab in "You Made Me!" by making him a Lemongrab clone, so he will have a friend who truly understands him. At the end of the episode, the princess bids them a fond farewell and they both invite her to visit anytime, indicating that the three of them are on good terms. In "All Your Fault" however, she sends Finn and Jake on a mission because the Lemongrab clones have run out of food. Finn and Jake, upon arriving, find out that the Lemongrabs have been using food to create candy people, because Princess Bubblegum accidently left the recipe for making candy people there. Luckily, after the monsterous lemon person they created turned himself into food after almost destroying the Candy Kingdom, Princess Bubblegum erased the candy person recipe from their minds.
In the Season 4 finale, she is the first person to realize that Billy is possessed by The Lich.