User blog comment:FairyRaven/Fairy Tail Chapter 413: Book of E.N.D., Review and Commentary/@comment-4829046-20141222153442/@comment-7418318-20141223154130

No. 9 seems to be a lot like what you describe already. He doesn't seem to feel any physical pain (at least not in his hands) though that might also be the result of injury, but he's also rather subdued on the emotional side.

If the series is going to go for a medium or long span of time, there won't be much choice about going into further details I think. Only ever showing the sentences carried out will get boring quickly, no matter how original each execution is.