Yuusha wa Osorezu

Elizaveta dreams of becoming a hero. To chase that dream, she enrolls in the Hero Training Academy and spends every day honing her swordsmanship. But her male rivals shun her for being a woman, urging her to abandon her ambition. Refusing to give up, Elizaveta presses forward—until a devastating tragedy strikes... Now stripped of everything, her journey of justice begins.

(Source: Manga UP!)