Nigel Pennyworth, code name Mr. Mystic (although the Ayla stories always use Mister Mystic), is a PDP and a member of the Cape Squad. He's about 6' tall.
He's usually with the Cape Squad when they appear.
He's with Pendragon when they try to get invited to Ayla's birthday party.
He's part of an exercise using Dyffud as the red team.
He tags along when Pendragon interrogates Ayla about Peeper running screaming from the cafeteria.
He's present when She-Beast asks Gloriana to be part of the shopping expedition to Boston.