|Species||Human - Magician|
|Book Origin||The Rogue|
Lord Leiden is Naki's step-father, who married Naki's mother after her former husband died. Later her mother also died and Naki was left to live with him. He is a Healer and lives in a mansion in the city. Secret in his library, he has a book on Black Magic and a ring which can block a full Mind Read.
|Spoilers from "The Rogue"|
One night when Lilia and Naki stay over, they learn Black Magic from his book, and Naki steals the ring. In the morning Leiden is found dead, and the Novices are questions. It is later revealed that Naki murdered him.