Wait a minute! It's old man Smithers from the abandoned aribites arcadiym.
And that servo skull would have got away with it if it wasn't for those pesky inquisitors.
Found on a dead world this servo-skull has apparently been projecting the holographic image of an unknown, dead guardsman for decades. No one knows why or how. But attached to the retinue it makes a great distraction for incoming fire and spooooky mysteries.