Misa Ilioroagu, born Misa Reglia, descends from dual lineages—her father Shin Reglia, a high-ranking demon, and her mother Reno, the Great Spirit. Nousgalia, the Heavenly Father God, orchestrated her existence by forcibly extracting her from Reno’s womb via Kurst, synchronizing her origin with the fabricated legend of Demon King Avos Dilhevia. Designated the "Child of God" destined to overthrow the true Demon King Anos Voldigoad, Misa was sent through Ezyssey, the Spring of Time, to a future where she enrolled at the Demon King Academy.

Raised unaware of her parents’ true identities, Misa understood only fragments: a royal demon father and a spirit mother who perished shortly after her birth. Facing societal scorn as a hybrid, she concealed her heritage. At ten, she inherited half a demon sword, believing reuniting it with her father’s half would bridge royal and hybrid divides. This conviction led her to the Unitarians, a faction fighting for mixed-blood equality.

As president of the Anos Fan Union at the academy, Misa masked Unitarian operations under the guise of a fan club. Her cheerful exterior hid a resolve to dismantle discrimination, driven by a longing to reunite with her father. She forged bonds with peers like Lay Glanzudlii, who gifted her a Michens Necklace—later transforming into a ten-pointed star crystal in her Avos form.

Nousgalia’s influence awakened Misa’s latent Avos Dilhevia persona, a tyrannical figure born from human and royalist myths. In this form, her appearance shifted to a towering figure with dark hair and regal garb, embodying Avos’s ruthless arrogance. Advocating pureblood supremacy, Avos persecuted hybrids and challenged Anos for power. Though Lay severed Avos’s control, fragments of the persona lingered, merging with Misa after rebirth.

Misa wielded spirit magic from Reno, summoning spirits and emulating their abilities, though less adeptly than her mother. As Avos, she commanded magic rivaling Anos, mastered spell theory, and temporarily wielded Venuzdonoa after seizing Demon Castle Delsgade. A defining act saw her risking her source to heal Lay’s mother, showcasing self-sacrifice. Following Avos’s destruction by Evansmana, Anos’s prearranged rumors resurrected Misa as a pure spirit, blending her compassion with Avos’s assertiveness.

Her bond with Lay deepened into romance, anchored in mutual ideals. Misa’s journey navigates identity, prejudice, and legacy, evolving from an activist to a figure harmonizing dual heritages. Reborn yet steadfast, she upholds her vision of unity, her narrative a testament to resilience amid conflicting destinies.