While his combat prowess has not been tested Doug frequently chimes in with comments for the group… Whether they would rather he did or not.
Doug was once in the possession of a half-elf named Devon who was the previous owner of the spelljammer the players found in the Whiteplume mountain. He had somehow been moved into the vampire Ctenmiir’s coffin in another part of the caves. This is where the party found him.
He seems to know some interesting things but only at a casual observance level. He knew the ship was a spelljammer and that it was fueled by spells; but, Doug does not know how it got where it was, how to pilot spelljammers, or whether or not he has eyes.