Tiadrin is Rayla's mother, Lain's wife and a supporting character in the TV series The Dragon Prince, serving as one of the two overarching protagonists of Season 3.
She is a member the Dragonguard, and one of the two elves (alongside her husband) who didn't run when Avizandum was killed or when Lord Viren took the Dragon's Egg. However, everyone believed that Tiadrin and Lain ran like the rest of the Dragonguard and were "ghosted" by their people as a result. However, she and her husband were trapped in one of Lord Viren's coins, with their daughter and her boyfriend, Callum trying to find a way to free them. Her spirit was later freed from the coin by Rayla and ascended the new world from the spirit realm.