I have seen a lot of confusion regarding this, so i'm here to set things straight.
- It was underswap but it became edgy so that black *It was underfell but then got swapped so they
and purple color scheme. kept the red and black coloring
- Sans can care *Sans doesn't care for anything mutch exept themselves
- Sans goes by Non-Canon nickname 'Blackberry' *Sans goes by Non-Canon nickname 'Rasberry'
(if anyone wants to add something, thats fine)