Nephilia

Nephilia is a rare case of hybrid between an angel warrior and a demon lord. At 200 years of age, she retains a youthful appearance of an 18-year-old female human. Notable features include gray hair, violet eyes, pale skin, horns (typically concealed). Standing at 165 cm with sizeable E-cup breasts and wide hips, she is considered conventionally attractive.

To conceal her inhuman nature, Nephilia hides her long horns and refers to herself as human. Her personality appears well-mannered and reasonable on the surface but reveals tendencies towards dirty humor, teasing, torture, and murder in private. While highly intelligent, her impulsiveness and straightforwardness can lead to overlooking obvious dangers. She fears others discovering her demonic half. She feels compelled to protect humanity from darkness due to maternal influence but struggles with internal demonic drives urging carnage and debauchery.

As a nephilim, she exhibits a combination of angelic and demonic traits. From her angelic mother, she inherited mastery of the blade, superhuman physical capabilities, and a sense of duty to protect the world from darkness. From her demonic father, she gained powerful fire magic, rapid regeneration, and an inner darkness characterized by sadism, bloodlust, and hypersexuality. While formidable in unarmed combat, she lacks formal training.

Nephilia wields a holy sword capable of killing any demon or corrupted being, though she is wary of its ability to end her own life due to her half-demonic constitution. She continues to struggle with the burdens of her mixed heritage, expressing regret over her conception by rape, the loss of her first love to old age, her mother's death in battle, patricide, and the harm of innocents.

In summary, Subject Nephilia is a complex figure with conflicting angelic and demonic attributes woven into her being. Her life appears one of duality and difficult choices in balancing altruism with personal desire.