Furina

Biologically, Chasca is a human native of Natlan with distinctive, elongated pointed ears—a rare hereditary trait seen occasionally across Teyvat—whose formative identity was forged completely outside human civilization. Her constellation, Vultur Gryphus, names the Andean condor, the majestic high-altitude raptor of the cordilleras, mirroring the Qucusaur matriarch who adopted her as a starving infant. Because she spent her earliest childhood mimicking Qucusaur vocalizations, preening behaviors, and territorial instincts in an Abyss-tainted wilderness canyon, she contracted chronic Abyssal Syndrome: a volatile affliction of the soul and nervous system that heightens her combat reflexes while requiring constant emotional discipline to suppress.

In the spiritual hierarchy of Natlan, Chasca bears the Ancient Name 'Vuka,' which translates to 'Transcendence.' For years, warriors wondered why a name signifying spiritual elevation belonged to a fierce mediator burdened by Abyssal rage. That question was answered during the cataclysmic defense of the Flower-Feather Clan: instead of succumbing to blind vengeance when Abyssal monsters slew her beloved sister Chuychu, she transcended her inner darkness and grief, awakening the full radiance of Vuka as the Hero of the Tlalocan.

As a helpless infant suffering from congenital Abyssal contamination, Chasca was abandoned in the rugged wilds beyond Quahuacan Cliff by her biological parents. Left to freeze beneath the mountain winds, baby Chasca was discovered by a nesting Qucusaur mother who carried the crying child back to her aerie and raised Chasca alongside her own feathered hatchlings. Growing up believing she was simply a wingless Qucusaur, young Chasca learned to hunt, leap across canyon updrafts, and defend her nest with tooth and claw.

Years later, when an injury left Chasca stranded near the border of the Flower-Feather Clan, Chasca was taken in by a compassionate human couple, Cusco and Bona, and their bright young daughter, Chuychu. Returning to human society was agonizingly difficult for Chasca: indoor rooms felt like cages, cooked food tasted strange, and Chasca's Abyssal Syndrome flared violently whenever bullies mocked her habits. Yet Chuychu refused to give up on her new older sister, patiently translating Chasca's brusque grunts, bandaging Chasca's scrapes, and teaching Chasca that human bonds could be just as warm as a Qucusaur's wing.

Determined to protect the tribe and family that had given her a second home, Chasca channeled her unmatched aerial marksmanship into becoming the Flower-Feather Clan's premier Peacemaker. Whether mediating disputes between stubborn merchants or disarming hotheaded duelists across all six tribes, Chasca earned a reputation as an impartial arbiter whose mere presence could silence a tavern brawl.