The Scales, Archfey goddess Cylellafaen

The ruler and enforcer of order and balance between the Seelie and Unseelie. They were stricken down by the Nameless’s human conspirator and haven't been seen in ages. The Nameless didn't authorize this betrayal but stepped up to pay the price for it regardless, as it was technically her subordinate. The punishment was for her name to be stricken, thus how she became the Nameless.
Naomi saw a child-like avatar of them sleeping upon the back of the unicorn that visits her in dreams.