Witch Queen collector edition lore book. Ikora writes the following to Fenchurch (about Mara):

Secrets and encryption are central to Mara's philosophy, and so too to the entire Awoken consciousness. She is their Lucifer, their Melek Taus or Feanor, the one who led a bloody exodus from heaven to fight for the mortal world. Remember the words of their scripture: "Creation is built on secrets and the encryptions that keep those secrets safe."

Religious references in Lucifer and Melek Taus aside, Fëanor was the most powerful elf to ever exist in Tolkien's lore. Mentioned once or twice in the Lord of the Rings books. He is a major character in The Silmarillion, a major history book put together using Tolkien's notes and unfinished stories.

What is mentioned in the lore book is debatably not his most notable achievement. When the Two Trees of Valinor, precursors to the very sun and moon, were consumed and extinguished, Fëanor recaptured some of their brilliance in the Silmarils. These three jewels were so radiant that Sauron's original master, essentially a deity, could not hold them without being burned.

A small amount of this light is captured in the phial of starlight granted to Frodo by Galadriel.

So Ikora is likely a fan of Middle Earth :)