As far as I can tell, she's trying to sort of...bring a part of her world here in a more literal sense. Music can do a lot of things, but I don't think moving universes to her whims is one of them.

[It's a bit of a shame that it seems Hibiki might be missing the fact of music being able to connect her to her home even without having to literally bring it here, but Maria doubts she'll be convinced. Unfortunately, sometimes someone has to be allowed to fail before they'll make realisations.]

It is true that we've had some strange things happen in the time we've been here, though, so I suppose there's not much to do but wait and see.