One question about him. Where is he? I have killed Trias and I am back in Sigil but I havent seen any sign of him. I dont know if I want him but I would like to see him. I think I did everything that there was to do. Help is appreciated and I know that some people hate him butlet me make that decision myself.
I have one little question more, what to do with the blade of the immortal? I got it from Coaxmetal and it says that it can kill even NO. Is there anything special with it or have I been carrying it around for no purpose?

You missed the spot with Vhailor, thank god!
You don't need that sucker, just continue playing.

But the area he is in is right behind the portal in Curst prison. You clicked on the portal instead behind it, so Vhailor remained there.

Blade of Immortal can be used in two ways:
- To make a "neutral" ending
- To press Transcendent One so he gives up

But don't ask for more spoilers, you'll see it in Tower of Regrets.

Sucker? Ah well, each to his own :)

Practically, Vhailor can be really useful if you're a mage- especially in Baator and the Outlands but he's a crazy weirdo so if you're a decent fighter it's probably not such a good idea.
I only like him because he's got a great voice and I could never tell what was pushing the line with him...

Doesn't even know he's dead- strange...

I've never had Vhailor in my party for long. I usually take advantage of the +1 Strength bonus you can get from him through dialogue, then get rid of him. His high MR is nice though.

He also has a wonderful tendancy to attack you, or just about anyone else that he considers to have committed a crime worthy of punishment. Which isn't exactly handy when you're trying to pry informtion for somebody. I guess Vhailor is the equivalent of the good ol' USA's police force then, kill first ask questions later...