Well I got a new 360. My ps3 is now collecting dust. Thanks to a video on youtube I found out how to ghetto rig my old xbox's harddrive into the slim's hard drive slot. So now I have my very old character Enmudeos who is at level 50. I'm trying to max all of his skills out and I'm almost at 100 with H2H. I've been beating up the Orc in the cellar of the castle but it's gotten boring, even though it is fun knocking him out and watching him fly across the room after being bitchslapped from a backwards power attack. Anyone know the answer to this because I want to beat the hell out of everyone in the castle except for unique NPCs. Sort of like a fighting tournament, just to see if any of them can beat me.

I've checked the Uesp for you. As far as I can tell, everyone is either immortal or respawns. The exception to this is the castellan (or his replacement if you killed him.), which apparently needs to be rebought. I could not find out if the dog is immortal or not.

Blimey... ...

I've never heard of this bit...Where's this then?...

It's one of those paid dlc bits. Battlehorn castle or whatever it's called.

The Battlehorn followers respawn if they die while following the player. Oddly enough, I had one die at the Battle for Bruma - looted his body even. Went back and got another, and while he was following me we passed the battlegrounds in Bruma where the great gate had been (siege machine, etc.) - and the one that had died was up walking around in circles! I sent him home, but don't know if he ever returned or not (they all kind of look alike).

I'm sure if you kill a named person they will be gone for good.