I have an idea for a supporting protagonist based off a man I met. He was a cowboy and hunting guide in Alberta until he had a stroke at the age of 39. Now he is paralyzed on the entire left side of his body and can barely walk. Everything he was good at evaporated in an instant. This guy was a riot to listen to and was one of the funnest drinking buddies I have ever met. I have an idea for a supporting character based off this person, except this person have a cybernetic leg and a pneumatic arm the can crush skulls. He's off of a chaotic good type character who leads a clandestine cell of rebels working against a large institution. Does anyone have any advice for writing such a character? I don't want to do something stupid or offensive. I just think it's a cool idea.