Jasper is an Antagonist of Steven Universe Z. She appears from Chapter 1 and onward.
Jasper is a psychopathic homeworld gem, hellbent on ensuring that our heroes never find out about her secrets. She fights with a Jasper helmet. She is the partner of Peridot in the Diamond Authority. Led by Yellow Diamond, she fought Garnet in the episode Jail Break before being fooled and destroyed by Lapis Lazuli.