Flame Princess

Flame Princess is a princess Pendleton Ward mentioned at Comic-Con 2011. She is from the Fire Kingdom and is "intense," as stated by Pendleton Ward. In the video, Jeremy Shada says that she is the same age as Finn. She's Finn's new love interest. She made her appearance in Incendium. According to his Formspring account, Adam Muto says, "that the voice of Flame Princess will be very familiar to fans to a certain show on a certain network." She has serious anger issues and is a bit psycho. She is described by her father as evil.

Finn
As she later chased after Finn (though it was Jake's impersonation of him) and Jake to the tree house, angered by his rejection. Another example is that she viciously attacked her own people with no regard for their being.

As she was still in her monstrous form, Finn believed her to be a monster. She accidentally started off Bubblegum's fireworks and was caught in the rain. She may have developed a crush on Finn. After he saved her from the rain, she asked why didn't he like her. To which he quickly replied he did. This reaction made her blush but she quickly smacked him; probably due to his supposed first rejection.

Appearence
She has long vermilion (orange-red) hair made of fire that when down, it falls down her back and when it's up it "flames" up. Her skin is a yellow color and she wears a long tank top dress that touches the ground. She appears to have a huge ruby on her head and one on her dress that may show her royalty instead of a crown. Her color scheme changes when wet, her skin changes to a pinkish hue and her hair to a lighter brown-pink.

Personality
She has a very hot-headed personality and is described as evil by the Flame King. When she get's angry she shoots flames out of her head and create Flambo-like creatures.