Here's Kamiko, the protagonist of Possibilisphere!

In the distant future, earth is running out of resources. To fix this, the greatest minds of the generation combine to create a pocket universe, using the thoughts of 100 human test subjects as a base for the rules of said universe.

Many die in the process, but in the end, they make the Possibilisphere, a universe based on both non-fictional and fictional mechanics across history.

Kamiko is a Space-scraper, someone who drives a train-like space shuttle and scrapes resources from the universe, eventually packing them into a device that sends them back to the doomed earth - Now a utopia from everyone in the sphere's hard work.