Sir Klutz Tripalotsky

In Curse of Strahd, Bascal Ofenheiss is a knight buried in Castle Ravenloft. His gravestone reads "He fell on his own sword". If his longsword is touched, Sir Klutz animates as a phantom warrior to serve the person who touched it for several days. Having died years before Strahd transformed into one of the undead, Sir Klutz is entirely ignorant of the cursed nature of the land

Sir Klutz may be revealed by Madame Eva's reading of the tarokka to be Strahd's Enemy]]. If this is the case, he only disappears when either he or Strahd have lost all their hit points.