Passenger

Nathaniel Kings never expected that moving to peaceful little Beach City would end with him getting involved in the machinations of an alien race. He certainly didn't think that he'd find a crashed spacecraft from beyond the solar system. And he definitely would never have thought that he'd wind up as the carrier of a sentient anomalous entity! Regardless, Nathan will face corrupted gem monsters, colorful alien ladies, a happy-go-lucky teenage kid, the nerdy girlfriend of an Amazonian warrior, and the looming threat of a galactic invasion from outer space; all while contending with the brand new voice in his head - as well as learning how to adjust to the perks of being a Xyrxi's vessel.

At least he gets to see a few of his old friends again... and maybe make some new ones along the way.

Steven Universe and all related characters belong to Rebecca Sugar.
The Stay AU for Steven Universe belongs to Evilsnotbag from FanFiction.net and AO3.
Everything else belongs to me.