Morty knows he shouldn't be screwing around with multidimensional shit. It's dangerous, it's impractical, it's blah blah blah. But it's a potential key to unlimited energy, how does nobody see that? He's built a dimensional siphon (it kind of looks like a cardboard box with a funnel and a TI-84 taped to it, but it damn well works), keyed in the dimensional coordinates to a random plane, and by God he's going to use it.
He flips the switch and waits for the energy bar to fill up.
It does! It fills up very rapidly. Then it explodes, along with the box. There's rather more smoke than there should be, and once the smoke clears someone is standing there.
"Whoops?" Morty says faintly.
"Thanks! I'll find out if I can take martial arts and then come do that."
She unpacks some of her things so if she's tired come bedtime she doesn't have to make the bed right then, and then goes to the relevant office.
"Hi! I'm Bella and I was accidentally summoned here from another plane, which is terrible anyway so I'm not going back. I'm told you're the person to ask about wearing my magic boots in martial arts class. Without them I routinely trip while walking at a sedate pace on level surfaces."
"Okay, thanks!" And she goes to beg the use of Ms. Dennon's computer for class picking.
"Oh, okay. Is there a library I can hang out in? I know you have paper books, I saw some in the store..."
"Great, thank you."
She goes to Beck Library to see what she may see in the time remaining before the next mealtime (what time even is it here).
Awesome. She looks for some kind of gentle high level overview of world history.
This world: has some history. This particular book, despite being ostensibly world history, focuses disproportionately on a continent called Europe, apparently because they beat everyone else up and took their things. Then they slowly stopped doing that, in fits and starts. At the time the book was written, everything seemed to be going okay.
Okay.
Reading through the world history book has taken her to dinnertime. She asks a librarian if they prefer she reshelve it or not here.