Sano's eyes widened a bit at the sight, staring for a moment before carefully, almost hesitantly reaching out, to comfirm that yes, those were metal prosthetics. Somehow. Well...it took all sorts, didn't it?
"...Must have been a hell of a thing, to take your arm off, hm?" Sano murmured, for a moment almost looking...sympathetic, before that sly look was back.
"...You know. If I ruled out all paraplegics from being cute, it would hardly be fair to them~" Were those fingers pressed lightly agains Ed's chest now? Oh, perhaps~ He'd ask more questions about that arm later, he had a mission.