Operative of the Human Resistance
|Out of universe information|
Jade O'Neill is the daughter of Jonathan J. O'Neill from a nightmare alternate timeline, in which the Aschen secretly smuggled a deadly bio-toxin to Earth and used it to sterilize and decimate the human race. Due to this, combined with the domination of Anubis over the Goa'uld Empire and the ravaging hordes of Replicators, the human race was left on the verge of extinction.
Jade, an operative of the human resistance, in which her father served as Commander-In-Chief, embarked on a mission through time, together with her father, to 2004. They teamed up with SG-1, successfully exposed and stopped the Aschen plot in time to save the Earth and kill the insane Aschen commander responsible for the toxin's development (ensuring the timeline was altered to a better outcome). The future saved, Jade and her father traveled back to a different future and never returned. (SG1: "Relativity")