An artist peice i did of my sans au character MB (moon blade) and a sans au THAT DOESN'T BELONG TO ME creds to original concept this is just my interpretation of dust!sans in my alternate multiverse.
Dust and MB would in my opinion be friends they would have to talk or fill the silence but if they did MB would probably be the yapper of the two
When first meeting, MB would be intrigued by dusts appearance and stature the cold quiet hides type
Dust would evenchually be MBs Anchor for there ventures when grillby isnt around.
Anyways feel free to ask questions id be happy to answer