Insanity! sans维基百科设定(11)

"PAPYRUS", his ghostly and corrupted brother. He showed Sans how to summon wormholes into other universes, and assisted him in his various trips across the Multiverse. It is truly unknown if "PAPYRUS" can die, but chances are there will be consequences
EnemiesSans has made a lot of enemies during his reign of universal destruction. Here is a list of his most notable enemies.

AvengeTale! Sans, who is one of Reaper! Sans's swordsmen. AvengeTale wanted Sans dead after Sans invaded and killed everyone in his AU. AvengeTale, on a desperate attempt to kill Sans, fabricated an alternate universe and made it look to be Altertale. The trap worked, but it only made Sans hellbent on killing him, as the trap had killed Rose.