I believe her original plan was just to go back in time to end up in the age of the dinosaurs.
But instead she fell asleep at the “wheel” and ended up driving her ship into Lily’s dream?

Granted, considering we are in dreams right now, and the only time we’ve seen her is when Kyouko is dreaming, she might just be a recurring figment of Kyouko’s dreams.

It might even be that she’s real, but being in her shop is causing some form of… Inter-Dimensional Dream I guess?

Kyouko is having a psychic vision! Yumemi is having a physics vision!

I hope this leads to everyone having dinosaur adventures

The original plan was to get more strawberries. Getting a dinosaur was mission creep.

The best evidence for them not being dream figments is that Doremy is acting like they're not. And she should know, unless she's also not real.

Okay even I can't translate that, what the peck are they even talking about?
Although more strawberries is a good use for space-time travel.

Seems like Yumemi will need some time and calculations to get back to the original Kyouko's dream, as far as I can get it.

memast said:

Okay even I can't translate that, what the peck are they even talking about?
Although more strawberries is a good use for space-time travel.

Yumemi: So I thought "oh no, my strawberries ended, BUT IF I go back in time five minutes ago, my bowl of strawberries would be full again!"
Yumemi: And then I noticed "Holy strawberries, today is 31 of August and the school year starts tomorrow, BUT IF I go back in time that would be still 20 of July again!"
Yumemi: BUT! BUT IF I GO BACK IN TIME FAR ENOUGH, I'LL BRING BIG DINOSAUR EGGS AND MY OWN PTEROSAUR IN THIS TIME!
Chiyuri: Professor, but won't you have problems with the army because of the flying dinosaur?
Chiyuri: And you did end up in the dream world, not Mesozoic Era.
Yumemi: Hm...
Yumemi: I vaguely remember that I... fell asleep on the time machine's control panel of probability space hypervessel?
Chiyuri & Doremy: You serious!?

Or something like that