Gender wise! I HAVE NO FREAKING CLUE IF METTATON IS A DUDE OR A GURL BECAUSE I JUST DONT KNOW THE FANART AND FANFIC IS CONFUSING ME!!!
...
So I'm making him a guy for this.. mostly because of the picture.. I'm weak.

For @Gigaschr

For the most famous monster in the underground, it was a dull and rather slow day. Everything was slow and no one had anything to do. Mettaton sat in his room and laid on his bed, staring at the ceiling in boredom and closed his eyes.

"Not one thing could happen today that would liven something up?" He ground and heard a tiny yelp. He sat up and to his surprise, a young borrower child, A HUMAN child was holding onto his hair and hung in front of his face, e/c eyes wide and their little form trembled. The child, who was two inches and named Y/n, was borrowing on their own when they'd lost their footing and fell onto Mettaton's head. Y/n was 9 years old but was very timid and was also told to not talk to monsters, but there was one problem right now.... This was a sentient robot, not a monster. Mettaton gave the human child a quick look; they had dirty old clothes on and needed a bath. They also had h/l h/c hair, s/c skin, and smelled funny. Mettaton gently plucked the trembling kid off his face and stared at them as they sat curled up in his palm.

"Well darling this day has suddenly become a very interesting day for us hm?" He asked holding them and spoke in his usual tone of voice; showy and ready for TV. Y/n nodded carefully.

"Y-yes ma'am," they said and Mettaton laughed loudly.

"Oh you poor little tiny human, I'm a sir," he smirked and Y/n paled at their mistake.

"I-I'm sorry!" They cried, afraid of being hurt.

"Honest mistake darling, most monsters had trouble seeing it as well," he said with a chuckle. He frowned slightly seeing how badly they were shaking and sighed. "I won't harm you if that's wha you're afraid of darling," he said reassuringly. The child calmed down a little bit after some comforting words and maybe a little chocolate. Mettaton smiled and gently got them cleaned up.

"What's your name darling?" He asked, giving them a (f/c) shirt and dark jeans just in their size.

"I'm Y/n mister," Y/n smiled. Mettaton nodded and petted their head.

"Lovely to meet you, Darling Y/n."

The end.... Im so sorry IDK where else to go from here! T-T