Flame Princess

Pendleton Ward and the show's cast first introduced Flame Princess at Comic-Con 2011.

Natasha Allegri has drawn Flame Prince, a gender-swapped version of Flame Princess, in her artwork. He has appeared in the mini comic that started in early January of 2013 and as a minor character in "The Prince Who Wanted Everything."

Flame Princess is the only known princess to have invaded another kingdom by herself.

In the original storyboard for "Hot to the Touch," Flame Princess was supposed to kiss Finn; however, the idea was dropped and reused for "Burning Low."

When Flame Princess transforms into her larger form, her face resembles that of her father, the Flame King.

She is different than the other flame people curiously, being that she can be completely wet and yet only be rendered unconscious at the most, instead of killed. This is possibly due to the fact that, as royalty, she likely has abilities beyond typical flame people.

She is one of the few flame people with a humanoid shaped body.

Although it appears as if Flame Princess' hair is made of fire, it does not disappear when she is extinguished or wet; instead it falls down to her back and behaves like normal hair.

When in a doused state, her gems appear to turn a maroon color.

She refers to Finn as her boyfriend in "Vault of Bones" and Finn refers to Flame Princess as his girlfriend in "Puhoy."

In "Puhoy," Finn is briefly concerned that their relationship is over after Flame Princess did not get a joke he made, and ventures into a Pillow World where he lives through a lifetime with a pillow wife and pillow children. When he dies of old age in this world and "returns" to Ooo, he immediately gets a phone call from Flame Princess telling him she now gets the joke, and promptly forgets about his "dream" of the Pillow World.

She is one of the two princesses who have ran away from home and lived out in the grasslands because they hated their parents and how they treated them. The other one is Lumpy Space Princess. She is also one of the two princesses to have another emblem aside from a crown to represent her royalty as a princess. The other one is also Lumpy Space Princess.

However out of the two, only Lumpy Space Princess has reconciled with her parents.

It may also noted that she is the third member of royalty that hated their father, along with Marceline and Lumpy Space Princess; however, Lumpy Space Princess's hate stretches to both her parents.

Although she overthrew her father and became the new ruler (making her obtain a crown) and started living in the Fire Kingdom again, she was still considered one of the two princesses as she does not have a crown when she was only a princess and she ran away from home and lived out in the grasslands at the same time.

In the episode "Hot to the Touch" It is proven that whenever Flame Princess's fires are put out, she gets hurt. However, in the episode "Vault of Bones" Finn threw a torch in the water that was lit with Flame Princess's fire and she did not show any pain. Also in the episode "Burning Low" Finn jumped in the water putting out fire that was on his foot that was caused by Flame Princess and she did not seem hurt at all.

In "Earth & Water" she overthrows her father and becomes the new Flame King.

In the episode "The Pit," Finn mentions that he still loves her, even though she rejected him in "Earth & Water."

Unlike the others, in most video games, she is seen in her outfit in "Vault of Bones" instead of her main outfit.