Reborn to Master the Blade: From Hero-King to Extraordinary Squire, Vol. 3 (manga) — Hayaken

Reincarnated as a girl far in the future, former Hero-King Inglis has the chance to hone her fighting skills. Lacking a Rune, she was free to spend her days engrossed in training while her beauty grew alongside her expertise with the blade. Now fifteen years old, she sets off for the royal capital to enroll in the knights’ academy with her childhood friend, Rafinha. But when their budget grows tight along the way, they might have to make a slight detour... What kind of mayhem is in store for them as mercenaries?