Domains: Mercy, forgiveness, the absolved.
Era of ascension: Golden Age of Man (~160,000 years ago). Cohort: dead. Died: God War & Long Winter (~75,000 years ago) — among the first the God War rendered absurd. The warring factions made her cult a target and extinguished it decades before the Winter formally killed the rest.
Worshipped by: The conflict-mediators of the Golden Age, the institutions that ritualized the granting of clemency, and the household-level traditions around the rite of forgiveness between estranged kin. No living culture maintains her worship. (The worships edge is authored downstream on the worshipper, not here.)
Romath was the daemon of the verdict. Henélleth was the daemon of its annulment, the theological annulment specifically, distinct from any human commutation or pardon, in which a soul was reset by formal rite to a condition where the offense had not occurred. The doctrine was uncompromising: forgiveness was a structural operation performed on the record, not a feeling and not a transaction, and once performed it was complete and could not be revisited. Her priests therefore had standing to override courts. The civil orders of the Golden Age tolerated this on the principle that a small leak in the verdict-system was worth the alternative, which was endless reciprocity.
The God War made her cult intolerable. Every faction needed grievance held — a war is fought on remembered wrongs — and her priests, by going on with their rite, were systematically removing the very memories the factions were mobilizing on. She was killed early and from the outside: her sanctuaries were burned by the factions in coordination across what had previously been hostile lines, in one of the first acts of the war her followers had been actively trying to prevent. The records that survive describe the sanctuary-burnings in dry liturgical Latin, with the names of the responsible parties on every faction's list and no faction denying participation. She was dead well before the eruption and the cold; the cold came along afterwards and finished the few of her priests who had been hiding in the mercy-of-her-absence.
The factions burned her sanctuaries, but the rite was failing under her regardless. Henélleth's hold on the material plane was seated by the anchor-vessel rite that Krathokh's priesthood maintained, and as the God War broke those orders her presence had begun to attenuate before the first torch reached her walls.
She is the opposed pair to the vengeance-daemon of the same cohort, who participated more aggressively in the God War than she ever could have refused.