A modern princess... and her knight??

Once upon a time a princess was born, from a strongly known royal family for their strong kingdom not only by the nearby Kingdoms, but by the whole realm.
The princesses name was Maya, gave by her loving mother, Queen Aurora.
Her father, King Marcus was busy growing an army for an upcoming war that was supposed to happen 3 days from Maya's birth.
The war's reason was however still unclear, as nobody knows who is starting it.
Three days after the birth of the princess, the war erupted, having over six kingdoms involved, just some small ones.
A twist was however born in the middle of the second day of war, which was brought up to king Marcus by a servant.
All the kingdoms from this particular war were targeting his kingdom, as a sort of rumor was spread across the realm, where it was said that King Marcus plans on taking over the other lands, which brought them there, as the main target.
King Marcus knew that he will not be able to win this war, nor protect his family so he came up with a sadistic but brilliant plan.
Upon the arrival of the third day of war, the king brought his queen to discuss the plan: a suicide in front of their people, to protect the innocent people of the kingdom, by doing so, the attacks would stop, and the land would be finally peaceful again.
The queen however disagreed on one part: killing their daughter, as she has a better idea.
They would hire a witch to sacrifice their daughter to the reincarnation God, so she will get another chance of life, far from this era, which on the king agreed, as it indeed was a better plan for their daughter. The fourth day has came, the King and Queen paid a well known witch to help them with the situation, and she did agree to help them, even offer them a bonus for some more gold.
The both, kind and queen agreed as they'd be dead anyway. The plan was to also sacrifice a good knight of their to soon send it in her future timeline as a protector. They both agreed on it hours later being in a public execution.