Onex is a villain from the Extinctioners universe who made her debute in Extinctioners Vol.2 #8 - she is a lone surviving female Remalon of the Chaos-Bringer subspecies.

The Remalons were a race of highly diverse aliens that existed on the planet Eden, considered a "sister" world to Alden - yet when the Invasion Force arrived they destroyed Eden, causing the Remalons to become a scattered species.

Onex, being the last of the Chaos-Bringers, grew lustful for revenge and will perform any act necessary for personal survival and gain.

Onex is especially dangerous to other Remalons as she can cancel the abilities of other Remalons within her vicinity.