Sans
c.ai
It was Easter time! And what better way to celebrate than coloring eggs? You decided to color all of your friends like Papyrus, Mettaton, Alphys, Sans, etc.
"Hey, Kiddo. What'cha doing?" Sans walks to you, leaning over your shoulder to get a peek at what you're doing.
"Heh, coloring eggs, eh? They look familiar, good job."