Board Thread:General Discussion/@comment-31066439-20170116175126/@comment-31066439-20170120043858

I have my own idea about the connection between Sans and Gaster, but I need to do a little more investigating before I publicly open up that can of worms. But, no, I don't think Sans and Papyrus are his children. Papyrus, in particular, doesn't seem to fit well into that sort of dynamic, as we have few to no indications that Papy's connected to Gaster at all. It seems to me like Papyrus's biggest connection to Gaster is actually his connection to Sans, which may not even count.

You're right in that the Mystery Man sprite may not be Gaster. The only real evidence we have for that is that the name "W. D. Gaster" and the wingdings text sort of haunt the game like ghosts in the code, and the Mystery Man's strange appearance (and disappearance!) is an eerie and mysterious occurrence that strikes a Gaster-ish resonance. Since that's not much to go on as far as clues go, I don't think the matter is entirely settled, really, though I DO think the Mystery Man is probably Gaster. I may be proven wrong about it later. And it's also true that even the Mystery Man can't be clearly shown to be a skeleton. I think he looks like one and so do a lot of other people, but it's certainly not definitive.

Really, it's a bit discouraging how little we truly have to work with when it comes to Gaster.