@TheGodEmperor
Well, she isn't raped.
With the Media, our definition of "humiliated" is kinda dark. But in the past, just verbal insult is counted as "humiliated".
@R3nAknyght
It's not okay. The whole country loves her. If they didn't get rid of her, she will become the queen. Well, simply put: Greedy for power.
@Fushiginiku:
They "take it for grant". In the novel, Fia's inner log told us that there WAS a lot of Saintess.
Her STUPID prince brothers thought that they could easily replace her with other Saintess.
Little they knew, her power is actually 1000 times stronger than a normal Saintess.
Spirit contract only -90% MP consume, so a Contracted Saintess is only 1/100 as strong as Fia.
Her enchant is multiply ( x 2 times or x 3 times) while normal enchant is addition (+ 10, +20 ATK / SPD)
She is an Idiot but she is a genius at the same time. She can understand the world, the monster, disease, etc.
Her Prince Brothers and assuming that one of them would be the King back then realized their mistakes.
They tried to pamper the new Saintess, hoping they can get another Saintess as strong as their little sister. But it's too late.
Without her, the whole Kingdom lost its glory.
The pampered new Saintess getting more and more Spoiled.
As you can, the Kingdom still exists after 300 years. But it isn't as strong as before.