Saya Kisaragi is the protagonist of the anime series Blood-C. By day, she appears to be an ordinary, clumsy high school girl, but by night, she is a skilled sword-wielding warrior tasked with defeating Elder Bairns, monstrous creatures that threaten her village. Saya is known for her kind and cheerful demeanor, though she harbors a hidden, more complex identity. As the series progresses, the mystery surrounding her origins and true nature becomes a central theme, leading to shocking revelations about her role in the ongoing conflict.