Anthony Edward Stark

"I wouldn't know," he responds simply, shrugging at Tony's response and trying to decide if he had known anything about other prosthetic implants before this. He doesn't think so. Nothing but your basic fake arms and legs anyway. The world has come a long way since then.

His head tilts slightly at the calibration maneuvers but he goes through with them. He's patient as Tony adjusts things too. He doesn't say anything but non-committal status comments or saying when something feels strange.

Once they're finished, he decides this is the best his arm has felt in a long time and he reaches for the knife again without problems. "Feels good," he tells him quietly.