Prototype 101R (RoboWarrior)- Main Character
Prototype 101J (John)
Prototype 101E (Erik)
Prototype 101T (Tytus)
Watt (Junkyard Owner)
Prototype 1000D (Diablo)
You spawn into the game in GrandCentral, the first state you are allowed access to. There are multiple towns, including Marais, Malboro, Lakersville, King's Avenue, and the Badlands. The Badlands is enemy territory and is full of enemies.
You are granted access to Hyporia when you reach Level 3. There are multiple missions in Hyporia including the first clue to finding Diablo. Some cities in Hyporia are Fifield, Zen Gardens, Hyporian General Hospital, etc.