WMG / Jiz

Jiz is a psychotic Drag Queen who either killed or kidnapped the real Jem.

Hence one video beginning with "Jem Girls" getting interrupted with a car crash and a screen saying "Jem is dead, long live Jiz." She also gave the Starlight Girls, Holograms and Misfits mind-altering substances that brainwashed them and caused their IQ levels to drop.