I have opinions on the Tar-Miriel as Witch-king (mostly, ew. Way to miss the point of the Ringwraiths, his character, her character, everything) even without caring overmuch about the characters. And besides how wrong everything is characterization and motive and timeline-wise, plus the undercurrent of “yay positive thing because two women as antagonists!” with what feels like that slide into ‘pro-King’s-Men’ attitudes….
Look, if you want a female Ringwraith, it could be doable. Picking Tar-Miriel just because of name recognition, however, nope.
Sauron seduced his wraiths by promising this Faustian deal of rings of power without mentioning the price tag. This happens around S.A. 1600, post-reign of Tar-Telperiën, the Second Ruling Queen. We know several older daughters of the kings abdicated their rights so that younger brothers took the throne instead. The King’s Men anti-Valar and clinging to life in unhealthy obsessions starts becoming strongly noticeable four hundred years after Sauron starts his Ring War, but he doesn’t have to be handing out rings to all nine at the same time or have settled on the same nine. Sauron could have easily offered a ring to an exiled or passed-over daughter or sister of the King, one would should have had the throne and desires power her gender has been denied to her, someone who hasn’t lived for years under Sauron’s mass murdering society and was raised and adhers as Faithful and in long years as opposition to him.
But not the Witch-king, because way to lessen the point of Eowyn’s I am no Man. grump grump
