I forgot the ringtails can climb.
I kept thinking it’s a weasel type critter that’s land bound....
I’ve had some experience with squirrels before, & seen countless youtube videos of them performing all sort of acrobatic maneuvers, so I would imagine this ringtail would be equal if not more agile than a winged rodent.
Try to deal with it sooner than later, once they get comfortable or start creating nests in your residence you'll be having a weekly battle with them instead of a once a cold season.
Don't forget they carry ticks/mites and other nasties.
I get the occasional field vole that seeks shelter indoors once the temperature drops below 20 degrees, but I can easily catch them within a few hours with one of my live traps once I noticed their presence.
If you manage to catch it LIVE, I heard from the animal control people right before they release it back into the wild, they scare the daylights out of the thing, by screaming/rattling the cage, so once released, the critters are less likely to return.
Good luck keeping "Miss Musky" out, if you can't remove them, get more pictures.
Don't forget to contact your local town/state's animal control officer to see if they have any suggestions.