Nothing!Sans

Backstory
=== At an unspecified time, his Au was attacked and he was kidnapped by monsters from another world. There, he met Setting, and the two quickly became close friends. During an experiment, the two accidentally teleported to TaleUnder. They encounter the Creator error and become her students. After a while, the Creator error received a summons and she never returned. Nothing and Settings keeps going to different AUs in TaleUnder for practice even though there are no more Creator errors. Then they returned to the experimental site, the time of the two places was different, so it was only 5 minutes from the time they were teleported to now. Nothing and Setting destroys the lab and saves the other kidnapped people. On the way to chase a monster, he encounters a girl who has just been kidnapped. After defeating the monster, Nothing took the girl aboard the spaceship that Setting had been waiting for. About a year later, Setting and Nothing formed Against Monsters. The organization began to grow and attracted government attention in many AUs, two years after the founding of Against Monsters Nothing and Maji (the girl saved by Nothing) got married. Not long after Maji became pregnant, Nothing went out to buy things once, leaving Maji with Robot-D at home. The remnants of the organization then attacked Nothing's whereabouts and killed Moji. When Nothing returned and Moji was killed, anger flooded Nothing's body and a mysterious necklace appeared that amplified Nothing's anger. Nothing creates a huge explosion that destroys everything within 2 kilometers, after which Nothing teleports away from the AU and is possessed by the necklace. ===