Failure Frame: I Became the Strongest and Annihilated Everything With Low-Level Spells (Light Novel) Vol. 11.5

In the fairytale land of Hylings, home of the high elves, there once lived a young girl who committed a great crime for the sake of someone she loved. Banished for her sins, this girl made her way to the Holy Empire of Neah, where she took up arms in the service of Princess Cattlea. In time, she would become Captain of the Holy Knights of Neah, and later be called the Princess Knight--but history would remember her first and foremost as Seras Ashrain, the beautiful but deadly sword of the Lord of the Flies...