Llama

When I was a girl, the Princess Flame was chaotic and free-spirited; She even told herself and proved that she was more powerful than her father, the Flame King. After hearing this, the King ordered a messenger to send his daughter away from the Kingdom of Fire to "wander to the outside world to perish." She was left in a nearby forest with a Stone Woodcutter, but he walked away from her, laughing at her and burning her surroundings. When Flame Princess wandered near the Candy Kingdom, Princess Bubblegum noticed this and while she was wearing a fire suit, she returned her to the Fire Kingdom. Upon arriving, Princess Bubblegum told Flame King to keep her baby under her control or she would do it herself. The Flame King initially denies having a daughter, however, he admits her paternity when Bonnibel insists that she take her back. They eventually came to an agreement and decided to trap the royal baby in a giant lantern for the rest of her life to ensure that she could never usurp her father's position in the Kingdom of Fire. Despite this, he seems to have made friends and grown up talking to Flambo through his flashlight.

It was not until fourteen years later in the episode "Incendio" when his father allowed him to free himself. after Flambo found her a boyfriend. Flame Princess is believed to have been a problem when she was a child despite growing up in a lantern, as the Flame King described her as "totally evil and destructive". Still, she was only freed because she believed "Prince Finn" was a cold-blooded killer who would be a perfect fit for her daughter. After leaving the Fire Kingdom to be with Finn, she resided in the grasslands inside a fire hut, as she did not want to be influenced by the evil of her kingdom.

as her relationship with Finn developed, they began going on dates and picnics. One of these picnics was interrupted when a fight broke out between Flame Princess and a passing Ice King, causing Finn to have a strange dream involving the Cosmic Owl. Realizing that the fight is what caused the dream, and that the Cosmic Owl was in it, Finn caused another fight by writing a rude letter to both Flame Princess and the Ice King, pretending to be both. He later had the dream again, in which the Cosmic Owl appeared and said, "You ruined it." This made a subtle confirmation that Flame Princess is quite important and has an unknown special bond with Ice King and Cosmic Owl. When the dream ended, Finn woke up to find that Phoebe had destroyed the Ice Kingdom and was trying to kill the Ice King. Finn managed to stop the fight and confessed that he was the one who wrote the letters because he needed to see the dream again and find out what it meant. She ended their relationship due to the fact that he had violated her trust, and it would be some time before they became friends again

Flame Princess has a volatile personality, but generally has a calm and sweet attitude, although with rather frequent tendencies it tends to sudden and violent mood changes. Finn describes her as "passionate", "bad" for her father Flame King and "intense" for Pendleton Ward[2].

The series takes place on a fictional continent called "Land of Ooo",[7] in a post-apocalyptic future about a thousand years after "The Great Mushroom War", a nuclear holocaust. According to Ward, the show takes place "after the bombs have fallen and magic has returned to the world." Before the series was fully developed, Ward's original intention was for the Land of Ooo to simply be "magical." But due to this change, the creatures are now mutations from the radiation of the nuclear bombs, except for Finn, Simon Petrikov and Marceline and the new species born after the war. (Finn and Simon are the only humans alive)

Being a fire element, Flame Princess is capable of using her fire and heat at will, transforming other citizens into Flambos, She can transform into a fire titan (Most Dangerous Form), throw fireballs that can vary in size, and separate her body into groups clearly separated from the flames.