I'm thinking about where to take this as well, maybe get him to wake Dante up and look for the girl under the bed? She's still down there, don't worry :D. I also think this might be a good time to get a glimpse of Trevean's powers as a Purifier. I'll leave the particulars up to you, but I'd like him to use them to drive the ghost away. Get a taste of what he'll really be able to do when he gears up.
Come to think of it... let's have him accidentally purify the ghost AND the window so they can all gtfo. I think I've done all I needed to do with them in the house. If you'd like to push the story along a bit you're welcome to cover the window opening up and them leaving, I definitely trust your more aggressive playing.
In all seriousness, I'm about to get the plot moving towards the end of Waterworld. After that Trevean gets to go on a diplomatic mission! :D Oh, and I don't know if I talked to just Kura about this, or you too, but they're all going to get to dress up and go to a ball soon. Yes, there will be dancing! Trevean is ultra-suave so I'm not worried about him, but man... Dante and Shola are not exactly party people! I think that'll be some good comic relief.