Spyglass in the art picture.
Spyglass is Gallant to Spectro's Goofus. He's an eager-beaver go-getter when it comes to espionage and surveillance. He's always on board with whatever sinister scheme Viewfinder cooks up for the Reflector trio, even to the point where he'll cajole the uncooperative Spectro into playing along—making sure, of course, that Spectro doesn't know too much.