Sisi (puppet)

 was a puppet of the Empress Elisabeth of Austria. She was created for  Johan Drossel by Gramm using Cyberman technology.

Doing her master's bidding, she managed to persuade Alfred Stahlbaum that the Empress herself had payed him a visit. In this role, she asked Stahlbaum to work more closely with Drossel. Not fooled by her performance, the Eighth Doctor demonstrated that she is made of wood by breaking her head off. (AUDIO: The Silver Turk)