- Name: River Altamont
- Date of Birth: n/a
- Status: Government Agent
- Unit: Pistol, dagger
- SBUI (Subject Behavior Under the Influence): Phasing
- Alignment: Central Government
River gives the appearance of being a sadist. She is merciless, fulfilling her duties as an agent without hesitation. Like Amil and Talis, River is on the government's special forces team; however, unlike the others, her DNA is not especially structurally similar to that of an Immune. Despite that, however, she willingly undergoes testing from Dr. Volsef's experiments.