She is the wealthy socialite daughter of industrialist Simon Stagg and is the long term love interest of the superhero Metamorpho.
[2] Simon Stagg greatly disapproves of Sapphire's devotion to Mason and schemes to break them apart (usually by putting Metamorpho into harm's way).
[4] For a time, Sapphire believes that Metamorpho has died, and her father arranges for her to marry his Neanderthal assistant Java.
His story is that Sapphire and Joey, Metamorpho's son, has been caught in a lab explosion and merged into a single energy being who was taking revenge upon Simon Stagg's former colleagues.
Sapphire was present when Simon Stagg opens a portal to the Dark Multiverse which The Terrifics travel through and when they return home.