Drones can be found in some missions who gain experience just like characters do, and can be repaired and upgraded with parts after appropriate research has been completed. Characters can have a single class such as Soldier, Technician, or Scientist.
In certain scenarios, drones acquire experience comparable to that of characters, enabling them to be repaired and upgraded with components following successful research. Characters are confined to one of three classes: Soldier, Technician, or Scientist.