[ If he were a real Rude Dude, he might laugh at that name and ask her to tell him what her real one is, but it looks like he's already pissed her off for some reason with his question, and he's quick to shake his head, emphatically, to clear that up first and foremost. ]

I don't know, but the living usually overlook me and can't see me, so that's why I had to ask! I thought maybe you're dead like me!

[ And, if she can tell by the inflection in his voice, he was just a little hopeful that she were dead, as terrible a hope as it is. ]