Domains: Deserts, wastes, dry-emptiness.
Era of ascension: Golden Age of Man (~150,000 years ago). Cohort: dead. Died: God War & Long Winter (~75,000 years ago), when the Long Winter froze every well in her domain inside one season and the kind of emptiness she presided over was replaced by a different emptiness with no theology of its own.
Worshipped by: The desert nomads of the Golden Age and the oasis communities at the wells they shared. The cult had no aristocratic priesthood; the well was the temple, and any adult of the nomad band who knew the noon-prayer could perform the rite. No living culture maintains her worship. (The worships edge is authored downstream on the worshipper, not here.)
Asha's iconography was the sun-bleached skull — animal, never human — and the dry well. Her rite was the noon-prayer at the well's mouth: the worshipper knelt at the lip, spoke the prayer down into the well, and waited for the silence to come back up. The theology was specific: she listened where there was nothing else listening. A full well had its own occupants and so was not her place; only the dry well, with its column of empty air, was a true mouth of her domain. The nomads accordingly prayed at the wells that had gone dry, not at the wells that worked, which struck visitors as backwards and which the priesthoods explained patiently to every traveller who asked.
The Long Winter killed her in a single season. The wells did not first dry — they froze. The column of empty air that had been her listening-place became, overnight, a column of ice; the prayers spoken into the lip did not fall the way they had; the rite stopped working. Her cult had no fallback theology for a frozen well, and the nomad bands either died on the move looking for an unfrozen domain or made it to the surviving polities, where they joined other cults that had already accepted the cold. The skull-and-dry-well marks survive on a few rock-faces; the goddess they marked is otherwise unrecorded.
Distinct from Vrokún, who is the wild with life — Asha was the wild without it, the hot emptiness specifically. The Winter swapped one emptiness for the other and her domain went uninhabited in the only sense that mattered.