Lucien is a lady-in-waiting of the Electress. He is described to have an oddly childlike face with delicate features. He has a narrow nose, a thin mouth, and cream-colored skin. Violet describes his eyes as "brilliant, almost shocking blue." His head is shaved except for a circle of chestnut hair which is tied up into a topknot—the hairstyle of ladies-in-waiting.
Ladies-in-waiting are more than just the highest of servants—they’re confidantes and advisors to their mistresses. They are selected and trained from a young age, and some of them are men. Male ladies-in-waiting are castrated so they can be “safe” to work so closely with royal women.
Azalea is Lucien's young sister and would have been a surrogate if the royalty had their way. Lucien was not the perfect father figure she was hoping for, but he was still the last person she thought of before she was executed.
Lucien first meets Violet when he preps her for the Auction. After Violet is sold to the Duchess of the Lake, she finds Lucien and he offers her a chance to reclaim her freedom. According to Sil, Lucien would not stop talking about Violet, she reminded him of his sister. In the Black Key, Lucien shows Violet his room and his workshop, making her promise not to let the royalty find it. He told her to destroy his workshop if the revolution failed.
Lucien and Ash do not get along well and only create a begrudging alliance at Violet's insistence.