Undertale/Steven Universe- When Monsters Rise
*I can't give proper credit to the cover artist, as it was found on iFunny; I only edited it. This story takes place before Peridot is part of the Crystal Clod- I mean, GEMS.
Steven Quartz Universe had been forced to fight a certain type of monster for years now, never having heard about ANOTHER type that he's more reluctant to enter combat with.
When the monsters are freed from the Underground and unified peacefully with the humans, Steven encounters a group of them, so much different than the others he's battled with before. This time, Mercy becomes the only option, as he will soon learn from one of the most unique figures in their squad- a human named Frisk, who is responsible for the liberation of monsterkind.
But when other humans and monsters alike are less accepting of the new changes, it's up to the pair, along with the Crystal Gems and Frisk's family, to prove to everyone that maybe the unification is more of an opportunity than a problem. Will they be able to convince all that they're not so different after all? Or do the fates have another plan?