Fay waited patiently for Kurogane to strip to his waist and watched as the ninja's skin goose-pimpled on contact with the cool evening air.
Permission given, Fay leaned in closer to get a better look. His vision - much sharper thanks to his vampire blood - roamed over the joining of flesh and metal. There was an area that looked a little inflamed, obviously irritated by whatever debris had come into contact with it, and potentially from Kurogane's poking at it. Thankfully though, they were a long way from it being the site of an infection - something Fay's senses would immediately pick up in his 'prey' - but that didn't mean it wasn't a concern, the skin was still healing after all.
He doesn't touch, not when he's been busy dusting, but he holds out a manicured finger, gesturing at the general area. "Here I think."