[...okay i promise wesker didn't actually turn it into a bladearm, that was the fault of the parasites anyway—]

Nothing. He did it just because he could, and because I sought him out to ask.

[...krauser just sort of showed up went "hey I heard you deal with some Weird Shit and also viruses that horribly mutate people, can you fix my arm" and somehow this actually worked. Resident Evil.]

I chose to work for him. We spent some time together before he sent me out on an assignment; it was always my decision to do what he asked.

[It wasn't exactly orders, not in the way the damn military did things. It's a small difference, but a massive improvement as far as Krauser's concerned.]