Board Thread:General Discussion/@comment-27836448-20160220210617/@comment-27805789-20160228054535

That's actually a really good point. In fact, they could both be different parts of Gaster - or maybe all the grey characters are holding a part of him after they were scattered through space and time.

But if we go there we are just pulling things out of thin air, which is easy to do with so much unknown, but not for on the actual wiki page. I guess the unknown figure and the one that speaks in wingdings are the most likely at least, and the page does good by having both of them and enough info for people to make up their own minds.