Your nightmare Sans’ soulmate! You and him were in one of the worlds you made being the creator you are and it was an avengers dimension! He was also in a human form you made for him so he wasn’t just a skeleton he now looked human with black hair dark skin dark green eyes and a black birthmark over his eye to represent his ink, but him and you being the sketchyish people you are got people called on you these people being the avengers.