Clériga

Clériga is an elf cleric who fought alongside a full party a horrible, immortal demon named Xyvran. As she regenerated, Clériga put a seal on her heart to prevent her revival, leaving her in a death state for years. 82 years after this, the seal began losing its force, and Clériga must venture herself, alone now, into the castle where she once fought, to repair the seal. Noticing along the way that her blood is slowly being absorbed. Each. Second.