One must not expect a hero to save oneself.
Yasiraqi understood this principle when she was very young, as her father told her personally. To hope for one's hero to appear in times of danger, just like the princesses in stories, is merely… the wishful thinking of the cowardly.
No matter the hardship, never give up on saving oneself.
Therefore, at a very young age, she had already discarded any yearning for a "hero," choosing instead to strengthen her own knowledge and willpower. She diligently learned everything a princess should, magic, swordsmanship, politics, music, history...
In the end, she became a qualified heir to the throne.
Even though her current predicament was quite terrible, with no way to confront the threat from the Dragon Kingdom, she still never abandoned the thought of saving herself, as long as she waited for her father's… death, her own country might be destroyed in short order.
And the force supporting all this was her father's education from childhood.