Rebecca, with a knapsack full of her school stuff on her back and a duffel bag full of her personal possessions hanging from her elbow, is pounding on the door of the Blake house. It's spooky, but that's kind of why she picked it, so she's not going to let it stop her from hammering on the door till her arm falls off or someone answers it.
Ooh, an audience. Rebecca's mostly improvising, she doesn't have very many pieces memorized and her sheet music is all upstairs, but she's good at improvising, Mozart's-party-trick style.
Eventually: "I lugged a bunch of sheet music along with me if you wanna hear anything I'm not making up as I go."
"Oh, if you like! I wouldn't begin to know what to ask for, though, I zero in on the Spice Girls whenever I'm picking through my aunt's music collection."
Then she trots upstairs to go get her bag of sheet music since it should live at the piano anyway. Is Rosy a Phantom person, she seems like possibly a Phantom person.
It takes her a bit to recognize Phantom but once she does she is, indeed, very happy about it.
Rebecca needs to get up to pee after Prima Donna but then she will come right back if Rosy wants an entire solo Phantom-in-concert.
"It's my favorite thing, if school'd let me take nothing but chorus all day I'd do it."
"Aww! I wish it would. Everybody should get to have the thing they're sparkly about."