Elias Ainsworth, a mage shrouded in enigma, embodies a hybrid of fae and human lineage, his origins obscured by fragmented memories. His earliest recollections trace to wandering a forest, collapsing in snow, and rescue by Lindel, a mage who mentored him under Rahab’s guidance. The name "Elias," bestowed by Rahab, anchors his nascent identity. Whispers of his past allude to a spectral or shadow-bound existence, marked by terms like "Rya Anam" (fleshly shell) and a violent 18th-century clash with the Church in a French port, earning him the moniker "The Rending-Eating Castle."

His visage typically presents a wolf-like skull crowned with goat horns, glowing crimson eyes, and a towering humanoid frame clad in tailored suits. Shapeshifting demands focus, yielding forms like a blond man, silver-haired girl, or clawed, thorn-adorned beast, but emotional strain disrupts these illusions. True form emerges in rage or protectiveness: a skeletal monstrosity with layered horns, rib-like protrusions, and primal ferocity.

Emotionally detached, Elias dissects human sentiment through clinical observation, mimicking social graces to feign gentlemanly decorum. Bonding with Chise Hatori—apprentice purchased as a bride—ignites fragile emotional growth. Jealousy drives him to destroy a college invitation; desperation nearly compels him to sacrifice others for her survival. These acts expose his inner clash: predatory impulses warring with a halting grasp of humanity.

Mastery spans shadow-wielding, teleportation, and destructive magic conjuring thorns or spears from darkness. He erases memories, possesses bodies, and splits consciousness into a canine avatar. Weaknesses surface in faltering glamour under stress and ineptitude with purification spells. Murky history hints at human consumption, a vestige of his ambiguous nature.

Pivotal arcs test his balance of Chise’s safety against autonomy. He rejects Titania’s offer to remain in the fae realm after her near-fatal crafting of Fairy Ointment. Later, his frantic bid to shift a dragon’s curse to Stella meets Chise’s refusal, cementing their shift toward mutual partnership, symbolized by informal ring exchanges.

As a magical college professor, Elias navigates social mazes while masking his true form, though instinct overrides disguise when shielding a student from magical backlash. Ties to Lindel, the Church, and fae rulers Oberon and Titania frame his reclusive, morally gray existence. His journey remains a taut thread between predatory essence and aching desire for connection, his ultimate nature—spirit, cursed mage, or singular entity—deliberately unanswered.