That would be so powerful as to be game breaking, but however unlikely it is possible. That would render my role all but useless then- only good for catching lesser scums or cultists I guess? I think it's unlikely.

What I do think is likely, though, is if I tried to roleblock him and he tried to kill me at the same time, the kill would win out (assuming I was unprotected). So you can assume that when I find the right suspect, if Hades knows about... I will be attacked at the very least.