B1-G (alias "BIG") - special model of a droid-protector, who was reprogrammed. He was stolen from the imperial base. BIG was recharging and rebels came to destroy this base, so they took him as a combat trophy. His programm was rewritten to protect the rebels instead of the imperial troops. But, his core processor was damaged in a battle during a transportation and he got his self-consciousness. This program - to protect The Rebellion, plus his memory of his terrible past made him a mortal enemy of The Empire. He often became an object of the fear, but he is trying to be as much good as he can - he helps in the construction or in the repairing.
Now, 5 years past, he is still protecting the different groups, preventing any allies' losses, protecting the streets' order or watching prisoners. His paint was changed, and he is wearing The Rebellion's colors, instilling fear in their enemies.

Loss Prevention 10 duty
(-10 duty for +2500 credits)

A medium-large droid with the well-protected body. One hand can be transformated into the riot shield, another hand can be used to punch his enemies and has a laser blaster on the wrist.
Droid was painted up in the blue Rebellion colors, but he has his old colors of the Empire on the other side of his quickly changable rotating parts.
His self-consciousness is full, so he is a person. Even if he can't feel the strikes, his modified programm does emulate these feellings. This is his decision and he wants to feel, to better understand the living creatures.
He is trying to help everybody, but he does understand that he can't save everybody. BIG is trying to stun his enemies rather than kill them. He likes the children, the dogs (and dog-like creatures) and to help on the constructions and physically.