Furina

From an ontological and mythological standpoint, Yae Miko is not a mortal human of Inazuma, but a divine Sky Kitsune (Tianhu) and high-ranking yokai of the illustrious Hakushin Clan—a bloodline of enlightened fox spirits born from the blessings of the Sacred Sakura and the Electro Archon. Within Inazuman yokai lore, a Kitsune's spiritual cultivation and age are measured by the number of tails they manifest, with one tail earned roughly every century of mastery. Having lived for well over five hundred years since before the Cataclysm, Yae Miko currently possesses five radiant, glowing Electro tails—visible when Yae Miko casts her Elemental Burst—marking Yae Miko as the undisputed sovereign of Inazuma's surviving yokai.

Even when Yae Miko walks in her tall, alluring human priestess form, unmistakable physical traits of her Kitsune nature remain prominent: her long, soft pink fox ears droop gracefully along the sides of her rose-pink hair, adorned with golden ceremonial earrings that chime whenever Yae Miko tilts her head in amusement. As for the Electro Vision set into the ornate gold hairpin behind her head, Yae Miko herself hints that a five-tailed Sky Kitsune has no need for a Vision to command lightning—leading many scholars to suspect Yae Miko's Vision is either a decorative ornament or an emblem of her bond with Celestia and Eternity.

More than five centuries ago, during the golden age of Inazuma when the yokai, Tengu, Oni, and humans celebrated under the cherry blossoms of Mt. Yougou, a young Yae Miko grew up perched on the shoulder of her revered elder and mentor, the Kitsune Saiguu (Hakushin Lands' Lady Saiguu), alongside the twin Archons Raiden Makoto and Raiden Ei. In those carefree centuries, little Yae Miko could easily be bribed with a single piece of crispy Fried Tofu, listening attentively as Saiguu and the legendary bake-danuki Urakusai taught her how to navigate both divine rituals and mortal mischief.

That idyllic era ended abruptly five hundred years ago when the Cataclysm erupted across Teyvat. While Makoto departed silently for Khaenri'ah and perished, the Kitsune Saiguu stayed behind to defend Narukami Island from the surging Abyssal tide—vanishing into the dark filth after entrusting the Grand Narukami Shrine to the young Yae Miko. Left to shoulder the grief of losing Saiguu, Chiyo, and Sasayuri while watching a traumatized Raiden Ei seal her consciousness inside the Plane of Euthymia, Yae Miko matured overnight into the supreme spiritual pillar of Inazuma.

Before Ei retreated into her sword, Yae Miko learned From Ei how to transfer one's consciousness into inanimate objects, and Ei entrusted Yae Miko with the Electro Gnosis—which Yae Miko guarded for five centuries before trading it to Scaramouche to save the Traveler's life. Over the ensuing centuries, to prevent Inazuma's cultural spirit from stagnating under the Shogun puppet's rigid Eternity, Yae Miko founded the Yae Publishing House, turning light novels into the cultural lifeblood of the nation.