Begin by Reincarnating into a Girl Knight

[No CP] Thousands of years ago, facing countless monsters, the female knight Belisa Gosio chose to make a deal with the devil and became the only tenth-level Grand Knight King. Under her iron hoof, the monster's kingdom was destroyed, but during the last eastern expedition, she was killed by the King of Blood. An unwilling soul and an unfinished deal gave her a chance to be reborn. The will that has been preserved for thousands of years was reincarnated into a descendant of the family in 1950. She became the eighteen-year-old girl Teresa Gosio, and became the most ordinary first-order knight. Now, she is about to die, the conspiracy of vampires, the secrets of the knight family, the fallen era, endless monsters, and unfulfilled contracts, all of which urge her to regain her identity as the king, crush all enemies once again, and kill all evil spirits with a blunderbuss sword.