Moric Sidrey is a Breton Vigilant of Stendarr.
Background
He is known for being the author of the book Minorne, which he wrote under the control of the warlock Minorne. In the book, he says that he sent word to the other Vigilants to meet him at Ruunvald.
Quests
Bolstering the Ranks
He can be found inside the Ruunvald Temple. He is charmed, just like the rest of the vigilants there and attacks the Dragonborn on sight.