Yaga, a retired sorcerer instructor and Coven of the Thirteen member, resides at the Artemis Institute. At 126 years old, his expertise spans Fantasia practices—glove and weapon techniques—honed through decades mentoring elite sorcerers.

Diminutive and weathered in appearance, he sports unkempt green hair, a wiry goatee, and narrow, slanted eyes hidden behind oversized sunglasses. His eccentric attire features a traditional black wizard’s hat adorned with a star-shaped crest and raccoon tail, a flowing black surplice, striped billowing trousers, and sharp-pointed moccasins. He navigates the Institute atop a wheeled cauldron, feather-tipped broom in hand.

Beneath his gruff, sarcastic exterior lies a keenly observant and compassionate mentor. Initially dismissive of Seth’s clumsiness, Yaga discerns the root of his Fantasia struggles, crafting a rigorous regimen that swaps Seth’s gloves for mittens to bypass energy blockages—enhancing control while concealing the youth’s latent potential.

He maintains a professional rapport with Alma, who entrusts Seth to his tutelage. Yaga’s teachings prioritize foundational Fantasia mastery, emphasizing a mnemonic technique where verbalizing spell names bridges intent and action. Though fellow Coven members reside at the Institute, Yaga remains the sole member depicted in recorded accounts.

No documented details expand on his history beyond his instructional tenure, Coven involvement, or appearances beyond core narratives.