This RP takes inspiration from Once Upon A Time and Kingdom Hearts - wherein the various worlds of Disney fairy tales and Final Fantasy games co-exist in a larger multiverse - but in this continuity, most of them are aware of the others and travel between them is commonplace. But first, a bit about this reality:
There are thousands of pocket dimensions known as Worlds, each one contained within a Cosmic Crystal that floats in an extra-dimensional space known as the Astral Expanse. Travel between them is made possible by using Astral Airships, which are able to utilize a Phase Drive to phase through the barrier of their World, enter and traverse the Expanse, and then phase into a different World. I'm envisioning the Expanse as similar to the Astral in Allods Online, and will add a video below to give you an idea.
As for the story, we'll start with sort of a Titanic/shipwrecked angle. At the beginning, our characters are in Nexus City, which is its own mini pocket dimension sitting in the center of Cluster A-13, which is a group of several dozen Worlds. Nexus City is a major port hub to catch larger airships to other clusters of Worlds. In the case of our characters, they are participating in the maiden voyage of the Gold Saucer Express, which is a resort and amusement park within a giant airship. It's about to set course for Cluster G-77, which is quite far away. The trip is expected to take three weeks to traverse the Expanse and reach the destination, then another three weeks back. But halfway through the return trip, an unexpected Astral Maelstrom materializes seemingly out of nowhere, sucks them in, and spits them back out in an uncharted cluster. The storm severely damages the ship, and they phase into the closest World just before the vessel crash-lands on a tropical island.
I'm envisioning the Gold Saucer Express looking similar to Balamb Garden from FFVIII, but covered in mostly gold and white exteriors. Here's a video to help you envision it:
I will be playing custom versions of Zack Fair from FFVII and Elsa from Frozen. Zack is a former member of SOLDIER, but after being subjected to Dr. Hojo's experiments, he grew disillusioned with all things Shinra and left that World behind. He now works as a freelance mercenary and has accepted a position on the Gold Saucer Express Security & Defense Squad. Elsa has just abdicated her throne in Arendelle and wants to see other Worlds, so she booked a top-tier suite for the trip.
Feel free to discuss your character ideas below, and let me know if you have any questions XD.