Frisk Kid

Frisk Kid is the non-binary ship between Frisk and Monster Kid from the Undertale fandom.

Canon
Monster Kid and Frisk first meet in Snowdin Town where Monster Kid assumes Frisk is a kid just like them.

Monster Kid and Frisk meet frequently in Waterfall, where Monster Kid talks about how cool Undyne is.

Frisk and Monster Kid walk past a beautiful view with stars and a castle in the background.

Monster Kid remains friendly to Frisk unless Frisk ignored them when they're falling or chooses to directly attack them.

Fanon
Frisk and Monster Kid are sometimes shipped as both are kids.

Fandom
AO3