Steven Universe - Sponge is Garnet and Pearl's....self-explanatory. I wonder who's the Amethyst of Bikini Bottom...

This is Spongebob
Back together
And the secret formula is never gonna be in the hands of the likes of you
Because I'm so much better

I wonder if buns also qualify a good-looking gem.

I mean, there may be some people that watch the show for the "plot."