Relations: ~~Family~~
Mother - Father
Brother:
In this Universe, unlike his Underswap counterpart, he is depicted as mean, serious and sassy. People often ship him with Fell!Sans as they are both have the same personality. His scar was on the left eye, he wears a red scarf that was tied, he uses a long red bone as a weapon. He wears shorts with golden stripe and a red belt, the design of his belt is a golden skull head. Inside of his clothes are red, he still wear his battle body, but its black, and the stripes are golden, while his shoulders are sharp, the lower of this red gloves are sharp, instead of flat golden stripes, including his upper boots, his lower boots, or flat are golden. Swapfell!Sans is much more powerful than his Underswap counterpart, since he now is a member of the royal guard, has trained a lot or captured a human once, which causes Papyrus to call him 'Boss' or 'Lord' instead of Bro, but Papyrus rarely calls him Bro.
He hates to be hugged and overall being toyed around with like a child due to his small size. He doesn't care what others think and only enjoys to torture Papyrus whenever he has possibility to do so.
(Pictures not made by me. They belong to their rightful artists.)