Billy felt absolutely terrible about causing yet another friend pain after everything he'd done, but he knew this service was necessary. She might notice that he winced along with her the first few times, and not because his hand was burned.

"I'm sorry, I'm almost done," he murmured, briefly brushing her back with his fingers as he moved to tie the bandage as securely and comfortably as he could. There was an angle he could use to keep it secure without placing too much pressure---there. Done.

"I presume you'll be operating the tank now?" Billy asked, gently tapping her uninjured arm.