Frederica Bernkastel is a mysterious and enigmatic character in the 'Higurashi no Naku Koro ni' series. Often regarded as the Witch of Miracles, she possesses vast knowledge of the different timelines and realities within the story. Her aloof demeanor and cryptic poetry add to her mystique. Serving as both an observer and manipulator, Frederica plays a key role in unraveling the mysteries surrounding Hinamizawa, and is closely associated with another character, Rika Furude, hinting at a deeper connection between the two.