Add a life size droid, like Proxy from the game Star Wars Force Unleashed, that can be used like a holo emitter to portray all different types of NPCs depending on the emitter cube placed inside.
Preferably have the holograms appear as real 3d NPCs.. like Proxy was able to do in the game. But a holographic image would be cool as well. Could do some that are, and some that aren’t.
Examples:
-Real 3d holographic images of Vader, Luke, Boba, and a replica image of any of our own playable toons, etc..
-Blue Glowy Holograms: Yoda, Obi wan, Leia putting the Death Star plans inside r2d2, etc
-Real or holo versions: Exar Kun, Axkva min, Tusken King, IG-88, Cyscc, Vartonis