He has fire-like hair styled up and a big red jewel on his forehead. He also has yellow skin and pointed ears. He wears an orange and red suit and matching boots, each with a red jewel on it. However, in "The Prince Who Wanted Everything", his boots were brown instead of orange.
In the episode Five Short Tables, Fionna saw Flame Prince in the library and awkwardly tried to hide from him, implying that they must have had a relationship in the past that ended in a bad breakup, the same way Finn and Flame Princess did. So, basically their relationship is the same as that of their genderswaps.
Cake apparently has some sort of hatred for Flame Prince, as she was seen angrily calling him a "Walking fire hazard" in the episode "Five Short Tables".
Flame Prince and Turtle Prince are good friends with each other. In the episode Five Short Tables, Flame Prince was seen having a conversation with Turtle Prince, which was very awkward for the both of them, as he kept on blushing and doing awkward things. Turtle Prince ambitiously suggested that he reads a book to Flame Prince, to which he nervously declined, saying that he only came to use the bathroom, which they both laughed shyly about.
|The following information is from the Adventure Time comic book series. It may not be part of the same canon or continuity as the animated series.|
- The picture where Fionna is over Flame Prince, drawn by Natasha Allegri, bears a strong resemblance to the scene in "Burning Low" where Finn saves Flame Princess from being extinguished.
- Even after the rest of his body turns blue in the first issue of the comic, the crystal in Flame Prince's forehead stays red. The crystal also stays with him after he is reduced in size.
- In "Adventure Time with Fionna and Cake Comic Issue 5," Flame Prince's costume is made by Cake.
- Flame Prince's first animated appearance was in the episode "The Prince Who Wanted Everything", where he was captured by animals to become one of Lumpy Space Prince's slaves.
- In the comics, Flame Prince does not become a prince until "Adventure Time with Fionna and Cake Comic Issue 5," where Gumball makes him a kingdom so he can be royalty.
Art by Natasha Allegri