Except that when she leaves the bathroom, she's not in the hallway. She's in what appears to be a large, brightly lit bar. None of these things apply to her hallway. She feels rather out of place; t-shirt, pajama pants and stuffed unicorn are not exactly magic bar attire. (She thinks.)
As far as Jenny knows, there's only one person in her immediate vicinity who associates with magic. This doesn't seem like Soph's style, but it also doesn't seem particularly threatening. From Soph's explanations, evil magic is pretty up front about being evil. "I replaced your hallway with a restaurant" does not scream evil to her, it's just weird.
She ventures inside a few steps. "Soph? Soooooph, is this you?"
The unicorn opens her eyes again; her horn dims. "I mean I didn't see it in advance with my spell. And it doesn't work here at all!"
There is a star on her butt.
"Is that why you have the star? That's adorable!" Jenny says enthusiastically. (Unicorn!) "Also. Hi! I'm Jenny! I'm sorry about your future...seeing...thing?"
"The star isn't because of my name, it's because of my talent," says Guiding Star. "Uh, it's nice to meet you."
"It's very exciting! You are many wonderful bedtime stories come to life! Seeeeee?" Jenny nods at Mr. Fancy next to her.
"It wasn't on purpose! I was returning it to my little sister and then the door wasn't the door it should have been and now I'm here. Me and Mr. Fancy both."
"Are you from Earth too?" Is there an Earth with unicorns, Jenny might have to move.
"Must be a different sun. That or we had different lessons about the solar system growing up."
"Probably both," she says cheerfully. "What else is different? Are there more unicorns where you're from?" (!!!!!!)
"Ponyville, awwwwww, that is completely adorable. It sounds so nice! Can the pegasi fly?"
"Well, in our world, the larger something is, the harder it is to fly! So I wasn't sure." She reconsiders Guiding Star's size. "Maybe it's not as much a problem for you...?"
"I can't fly, I'm not a pegasus. I have some pegasus friends, and they have wings, and they're about my size, maybe a little bigger because I'm pretty skinny, and they can fly."
"Eep, sorry. I meant collective-you, not you-in-particular. I promise I am not hallucinating you wings!"
"I mean, not that I wouldn't be flattered if you thought I was a princess, but I'm not."