Viper and Noire spawned from the Fat Mogwai, Gus, along with a third, Crimson. The Three Spawns fell into a sex Serum changing them into Female Mogwai.

Viper seems to have a particular hatred for Crimson, and attempts to destroy her at any given opportunity. She if fast and agile, rare for a Mogwai do to their inability to move fast. Viper's one sole weakness is her vanity - she doesn't like that anyone ruins her fur - if you do run for your life.

Noire is Viper's partner in crime and the youngest of the three odd female Spawns from Gus. She enjoys taunting minority Mogwai, especially Kira, one of Crimson's later Spawns, for her childish attitude.