1. My apologies, I must have misread. So he's like a combination of logistic support/record keeper? That's cool but it should be elaborated on.

2. You can come up with other explanations. He can be a technical genius who invented a cybernetic prosthetic. You can come up with any power source as long as it makes sense. Keep in mind that your character having genius as a trait isn't enough, they have to back it up in the actual game