Board Thread:Questions and Answers/@comment-31981697-20170724072306/@comment-37483605-20181213114308

Koala990 wrote: Gaster can or can not be their father, but if they had parents, they'd be dead ( maybe they died on the war ) or they're just around, but it's not in-game but look at monster kid, he has a mother, but she isn't seen in the game... ASRIEL has a mother and a father so if sans and papyrus had a mother and a father i would guess gaster since he is a skeleton and the mother unknown since we don't know who is would be