Flame Princess

Flame Princess is the princess, (now queen), of the Fire Kingdom and was the former love interest of Finn. When Jake asks Flambo if he knows any princesses Finn's age, he responds that he knows "just the skirt... and she's WAY hot." Flame Princess is locked in a lamp in the main chamber of the Fire Palace when Jake first encounters her, so she merely spectates during most of Jake's visit. Flame Princess's role as a character is defined predominantly by her relationship with Finn, until they broke up in "Frost and Fire."

Personality
Flame Princess has a volatile personality. She is described as "passionate" by Finn, "evil" by the Flame King, and "intense" by Pendleton Ward. The Flame King also remarks that she is difficult to control. She seems to be very sensitive and quick to judge. She is also prone to unprovoked fits of aggression, as shown when she throws fireballs at her citizens just for whispering. Based on this outburst and her imprisonment in the gas lamp it is likely Flame Princess has a destructive nature, though it is possible her nature is a result of her imprisonment. Flame Princess is also impressionable in a positive way. She is very happy when Finn calls her beautiful. She was also interested when Jake was giving her gifts in the episode "Incendium" and excited when her dad let her date "Prince Finn." This excitement quickly turns to anger when "Prince Finn" rejects her.In the episode "Hot to the Touch", Flame Princess shows curiosity about her new surroundings by examining flowers. This sets them on fire and she seems a bit surprised by the reaction, indicating she doesn't know much about lands other than the Fire Kingdom. At the end of the same episode she shows that she likes Finn, but thinks that they can't be together because they are opposite elementals (she thought Finn was a water elemental because of his crying). In "Burning Low," she seems to be calmer and she seems to be able to handle pain, illustrated when Finn jumps into the pool while his foot is on fire, and she doesn't react.

Trivia

 * Natasha Allegri has drawn Flame Prince, a gender-swapped version of Flame Princess.
 * The reason Flame Princess was in the prison was because her 'elemental matrix' was unstable and exposure to romance would caused danger. It was Princess Bubblegum who confirmed this and informed Flame King.
 * Flame Princess may like Finn back; she says "even if we like each other we're going to hurt each other," implying she likes him too. She also seems to be happy when Finn admitted that he likes her and smiled when they tried to hug. This is confirmed by "Burning Low."
 * Flame Princess refers to herself as a fire elemental and refers to Finn as a "water elemental" (which is technically perfect, since humans are mostly water).
 * Flame Princess is the only known princess to have invaded another kingdom (solo).
 * Flame Princess's gems may be indicative of her royal status in the Fire Kingdom, similar to the stars of Lumpy Space royalty.
 * In the episode "Burning Low", Finn kissed Flame Princess for the first, second, and third time.
 * As of "Burning Low", Flame Princess and Finn started dating for a while. But in "Frost & Fire", Flame Princess broke up with Finn; though its possible that they're still no friends.
 * She wears a different dress in "Ignition Point."
 * Pendleton Ward revealed that Flame Princess will return a little more redeemed in Season 5.