Black Ice

I don't understand. So, I wrote my character's bio here, in the thread, and then I come up with a couple more personalities, and during the game (when interacting with characters), can I pretend to be those other guys?

Added 3 minutes later
And what about the stats? Does the GM determine them? O_o

Added 1 minute later
And where is the ranged weapon?(((

Added 2 minutes later
There's no ranged weapon?

Stupid game! I won't play it!