Flame Princess has a short temper and volatile personality; she usually has a calm demeanor, though with rather frequent tendencies to sudden and violent mood swings. Flame Princess is bold, sensitive, and quick to judge. She is also very aggressive, as shown when she throws fireballs at her subjects just for whispering. However, although being ill-tempered, Flame Princess was shown to be able to control her anger well.

Since she was locked up when she was only an infant, Flame Princess is not educated properly and does not know much about the outside world of the Fire Kingdom. However, by now, she seems to have improved on her knowledge and had shown some intelligent traits.

 

After the events of "Frost & Fire," Flame Princess becomes more aware of trusting people and getting into relationships. She seems to have become more serious and dislikes how people "hide" facts from her. She wonders if "everybody is hiding something" and wants people to be completely honest so that she can get to know them better and as well not getting herself tricked. Wanting everybody to be trustworthy, Flame Princess enacted a rule in the Fire Kingdom to be completely honest after she overthrows her father and became the new ruler, no longer wanting to be fooled again.