Desmond Cataliades was a semi-demon in "The Southern Vampire Mysteries". He is also uncle to Diantha and her late sister, Gladiola. Lawyer for the Queen of Louisiana, Sophie-Anne Leclerq, in which capacity he handled the estate of Sookie's cousin Hadley, who was Sophie-Anne's former lover. His brother is a full demon .
Desmond was a good friend to Sookie's biological grandfather Fintan and came to visit all of his descendants, Sookie was the only one to have the "spark" and he gave her the gift of telepathy. In Deadlocked he mentions that he will help Sookie develop her telepathy and he also explains the only other telepath Sookie knows, Barry the Bellboy is his great-grandson.