Once In A Blue Moon is a series of graphic novels published by Oni Press, written by Nunzio DeFilippis and Christina Weir.
She never found out what happened next because her father died on a business trip, her mother, stricken with grief, throws away all of her fantasy items, Aeslin manages to save a special toy dragon.
There, she meets up with a tough girl whom she becomes friends with, and the author of the books son, who is chronicling the story.
She tells her that she was originally the "Dragon Knight" (savior of the kingdom) but fell in love with her dad the prince after she slays the bad guy and goes home and returns to a normal life.
Then she finds out that the bad guy wasn't slayed so she and her husband go back on a "business trip" but her father is "killed" by the bad guy but then they find out that he is still alive via the means of a magical flame that will always burn while the current member of the royal family is alive.