Daughter of Desire

Sairalindë was a Lord of the Rings Sue who held an uncanonical Important Object, the Ring of Sairalindë.

DOGA Agent Dafydd Illian arranged for her slaying by the Witch-King, her purported father. He also made off with her Ring, a fact which later became important.

Link
Saira's 'fic has been lost, but the mission can be found here.