The planet is used as a gigantic nature preserve, with representatives from almost every known Viperian species.
- VWP employees (Salsenes, Atrenids, Zyrothans, Vrah mercenaries)
- Sigma Spider
- Tigrid Hunter
- Burrow Wyrm
- Saber Terune
Prospero was originally a lifeless, barren world. It was terraformed by the Salsene Grand Fleet, and was populated with cloned animals.