Tenshou shita Dai Seijo wa, Seijo de Aru Koto wo Hita Kakusu

Fia comes from a family of knights but is considered the weakest among them. Despite this, she remains determined and trains hard to fulfill her dream of becoming one. During a test to prove her abilities, she is assigned to defeat a minor demon but encounters a dragon instead. Seriously injured, she experiences a vision of her past life, where she was a powerful Saint who had once vanquished the Demon King. That life ended in suffering due to her identity, leaving her afraid of reclaiming her Saint powers. Now, with that magic reawakened, she has the potential to surpass her current limits as a knight, provided she can survive the challenges ahead.