When the original nine ethereal Muse beauties were no longer enough to cover just about every aspect of mankind's artistic endeavors, there came a need for supplementary Muses. Threnia was one of these 2,200, the Muse of Modern Fantasy Novels. Like her sister, Phretys, she was a member of the Supernatural and Fantastic Wayfarers Association.

Threnia bore Lucien Kaine a child, sometime between 946-949 GUE during the period when he was roaming the Great Underground Empire as the Thief. Previously she would have been forbidden by to raise a family by the Supernatural and Fantastic Wayfarers Association, but by the 10th century the standards had been updated to keep abreast of the times. Their child, Spike the Protector, would soon after be abandoned as an orphan, never even knowing the identity of his mother.