Frisk is the main protagonist of Undertale, is a young human who falls into the Underground, a realm filled with monsters. A fanart Undertale progress bar for YouTube with Frisk and Mettaton Dance.
Mettaton is a robot with a soul that was built by Alphys in the Undertale game. Mettaton was initially intended as an entertainment robot but turned out to be a human-killing robot. A fanart Undertale game progress bar for YouTube with Mettaton EX Dance.