The website and LN trailer cleverly use Felmeia's cuteness as if she was the heorine (the kingdom's magic user), but "no one" points her out as the heroine (If you read jp profiles, you'll notice that most places take the time to list who are the heroines and who aren't, as to "sell the appeal").
I browsed through the prolog (as usual, I'm supposed to be doing something else
), having her cute & cherubic ambitions coming crashing down in a large ball of (white) fire was probably the best example of gap moe I had seen all day
The novel does use Majutsushi / Magician [ 魔術師 ] and Mahou Tsukai / Magic user [ 魔法使い ] as if they were two different 'disciplines'.