Hans Seiderman was a practical joker and book keeper who always made people laugh. He ran a book store in Berlin, Germany during the 1940's and did many comedy shows there. He was very good friends with Andre Toulon and taught him how to do many tricks. He was shot dead by the Nazis for taking his jokes too far. His soul was placed into the puppet Jester.
Puppet Master III: Toulon's Revenge (Mentioned)
Action Lab Comics
His name is Hurd Kaiserman on the Full Moon Trading Cards.
Hans in the new human body that his spirit was transferred into (Action Lab Comics)