Tenshou shita Dai Seijo wa, Seijo de Aru Koto wo Hita Kakusu: A Tale of The Great Saint

Fia was born into a family of knights, but she struggles to match their skill and has never shown much promise. During her initiation test, she suffers a severe injury that triggers a vision of her past life as a formidable Saint who once vanquished the Demon King. In that life, her death as a Saint led her to vow never to embrace sainthood again due to its risks. Now, her Saint powers have returned, offering her the potential to become a far stronger knight than she ever imagined. However, she must first survive long enough to harness that power.