The Otome Heroine's Fight for Survival (Manga): Volume 4 by Harunohi Biyori

Alia successfully tracks down the “mysterious figure” haunting the Barony of Sayles—a mad water spirit cut off from its source element. Her fight against the spirit is interrupted, however, when a familiar figure intervenes and tries to kill her then and there. Outmatched, Alia is forced to flee–but in defeat lie new opportunities. Now with a nemesis and a new goal, Alia seeks out a mentor in sorcery and sets down a path that will forever change her life.