Flame Princess

Flame Princess is the princess of the Fire Kingdom who first appeared in "Incendium." She is voiced by Jessica DiCicco.

Jake
Jake enters the Fire Kingdom to court the Flame Princess on Finn's behalf, who was feeling heartbroken after being rejected by Princess Bubblegum. Although it is unknown how she feels about Jake directly, she does seem to enjoy his song, as well as the fact that he accidentally kills her father's jester by spilling water on him. It should also, however, be noted that she cheered after Jake was seemingly choked to death by a fake Finn, and she attempts to catch, and kill him after fake Finn rejects her.

Finn
She does not actually meet Finn in person until the very end of, after Incendium which point she chases after Jake (who had been posing as Finn towards the end of the episode), and begins to burn down the tree house and all of the objects in it. After she is doused with Liquid Pyrotechnics, Finn briefly manages to catch her as she falls, and brings her into the tree house where she angrily asks why Finn doesn't like her. Finn replies that he does, however, and the Flame Princess blushes, slaps Finn, and warns him never to mess with her again before fleeing. Any feelings she may have towards Finn are currently unknown, but due to her only just recently meeting Finn, coupled with the incident, she may be in a state of confusion over him.

Denizens of the Fire Kingdom
She appears to show very little concern for her own subjects, bordering on outright contempt, as she transforms a small group of citizens into creatures similar to Flambo solely because they idly whispered behind her back. Due to her destructive nature, she was locked in a large glass lamp suspended in the middle of the throne room by her father, The Flame King. Despite this, however, she does not appear to harbor any ill will towards him.

Appearance
She has long vermilion (orange-red) hair made of fire that, when down, falls down her back, and when up, takes an appearance similar to flames. Her skin is sun colored (yellow-orange) and she wears a long tank top dress that touches the ground and she's barefooted. She appears to have a large rhombus-shaped ruby on her head and a smaller one on her dress that may show her royalty instead of a crown. The two rubies are similar to the many small rubies that Flame King has on his armor suit. Her color scheme changes when wet, her skin changing to a pinkish hue and her hair to a lighter brown-pink. She has a body-type similar to Jungle Princess and Fionna's. Patrick Seery has stated that she is based off a candle.

Abilities
In her smaller, humanoid form, she is shown to have the ability to transform the other citizens of the Fire Kingdom into Flambo-like creatures (Flambo remarks that this method must've been used to create him as well, implying that this is not the first time Flame Princess has used this technique). She is also able to transform into a much larger, more dangerous form composed of fire which she uses to follow Jake back to his home, and then proceeds to burn it and everything inside. However, like many residents of the Fire Kingdom, she is weak to water and if any flames that she produced are harmed or put out in anyway will hurt her, like parts of her life force lives in her flames, unless as it shows that she can extinguish the flames that she made by her own free will. After unintentionally setting off some of Princess Bubblegum's liquid fireworks above her head, she is quickly reduced to a weakened state, where her skin changes to dull shades gray.

Personality
She has a very hot-headed personality and is described as "evil" by the Flame King. She angers easily and seems to have very loose control over her own powers, as demonstrated when she shoots flames out of her head, creating Flambo-like creatures, which is likely the cause of her imprisonment in the first place. The Flame King himself, remarks that she is difficult to control. She is also shown to be very curious when Jake was giving her gifts in the episode "Incendium." She also appeared to be very loving to Jake's clone of Finn (made with Jake's stretchy powers) until he rejected her. Pendleton Ward has referred to her as "intense."

Trivia

 * Pendleton Ward and the show's cast first introduced her at Comic-Con 2011.
 * Natasha Allegri has drawn Flame Prince, a gender-swapped version of her.
 * The reason Flame Princess was locked in a lamp is unknown. It may be because her father didn't want her breaking out and going psycho. Alternately, she may have become psycho from being locked up all the time. It could have also been for her own protection.