Read Queen of Avalon Manga:
"Queen Arthur. That is your name from today. "I was summoned to save the kingdom that King Arthur had rolled over.As the Archmage Merlin said, I am the possessor of the same soul as King Arthur. If I find the Holy Grail and complete my mission, will am I be able to live with love? But why are knights so rude? Xian, who has been living a life of bliss for 20 years. When I woke up one day, I became a character more.. in a legend!The magical story of her becoming.