Madou Monogatari

Arle's world receives an unexpected visitor: Ragnus, cursed by the entity Yoggus and flung into her reality against his will. Ragnus's arrival is a symptom of something larger — strange creatures called Yogs begin appearing throughout the world in its wake, spreading an influence that destabilizes everything they touch. Arle, joined by Rulue, her companion Carbuncle, and others recruited along the way, begins the work of defeating the Yogs and confronting Yoggus itself.