the highest ranking of the person will see everything that will come up in the future and a OC is basically your character of the core facility and you could put in a song and make a animation or sound effects you could really do anything but you have to have your reactor core and OC you could make your OC do anything you want that's it
and here's the remix tree https://scratch.mit.edu/projects/1211734233/remixtree/
