(written from a Production point of view)
Petra Sprecher (born 2 August 1973; age 47) is a stunt actress and stuntwoman who played a Coppelius android in the Star Trek: Picard first season episode "Et in Arcadia Ego, Part 2". She received no credit for her appearance.
Sprecher filmed a fight scene for the episode with stuntmen Bryan Cartago and Trevor Logan (the latter doubling for Harry Treadaway), which was rehearsed for nearly a week. However, most of the fight ended up as a deleted scene. 
Born and raised in Switzerland, Sprecher began training with a local youth circus at the age of seven. A trained acrobat, she performed for three years with the Canadian circus troupe Cirque du Soleil. She moved to Hollywood and began a career as a stuntwoman in the early 2000s. She appeared in films such as Minority Report (2002, with Neal McDonough and Sumalee Montano), The Time Machine (2002, with Doug Jones), and Æon Flux (2005). She served as stunt double for Rosario Dawson in Eagle Eye (2008, with William Sadler and Deborah Strang).