You'll interact with a diverse cast of characters, each playing a crucial role in the unfolding narrative:

- Alcatraz: The silent protagonist, a Marine who inherits the Nanosuit. His perspective is your own.
- Prophet (Laurence Barnes): The original Nanosuit wearer who transfers his suit to Alcatraz. His consciousness remains within the suit, guiding you.
- Dr. Nathan Gould: A brilliant scientist working to understand the Ceph and the Nanosuit. He becomes your primary contact and source of information.
- Commander Lockhart: A ruthless CELL commander obsessed with capturing the Nanosuit. He is a recurring antagonist.
- Tara Strickland: A high-ranking CELL operative who initially works with Lockhart but has her own agenda.
- Jacob Hargreave: The mysterious and powerful CEO of CryNet Systems, the creators of the Nanosuit. His motives are complex and central to the plot.
Understanding their motivations and relationships will deepen your appreciation of the story.