[X]Perspective switch (Joeseph Joestar)
[X]Ask Mizore what the problem is.
-[X]Offer to let her stay in your room tonight, if she's that freaked out.
So, this vote...
As I'm reading it, it offers to switch perspective and then, as Joseph Joestar, to ask the unknown girl who's opened the door what her problem is and offer to let her stay in his room that night...
...Yeah, I can see why Mizore would be wary.
That bit of nitpicking aside,
[X]Reassure Mizore that the Big Bad Monster Slayer JoJo isn't going to eat her in her sleep.
-[X]It'd be one thing if he was his old self, but
come on. The old man went on to father
your mother of all people--how threatening could he possibly be?
--[X] Switch to Joseph's perspective
Seems more sane than offering to let her in your bed right after she figures out you're the grandson of the monster chindren's Boogieman, and I don't see the other option winning without that offer.