Board Thread:General Discussion/@comment-27414715-20160302213117/@comment-27907368-20160303091742

It's a bit hard to give a nod to the followers in this case because we do not know much about them. What does "follower" even mean? They followed his work? They followed him across time and space and thus only appear in the game once it is manipulated?

Though it is speculation, it is near certain that sans was one of the people that Gaster was speaking to. Sans knows about the anomaly and timelines, which is a huge part of Gaster's work. I say very hesitantly that Undyne did not have the chance to work with Gaster - she was in training for the Royal Guard for most of her childhood, right? We know for sure that we occur in the Underground during 2110-2119 or after, by a few years. It honestly depends how much time Flowey messed around in his timeline that we ultimately interrupted. We know for sure Flowey's timeline lasts a few weeks - with the upper bound being God knows. The other human souls did fall within 100 years, though.

Anyway, what I'm saying is that I don't think it's Undyne. She would have been more familiar with Alphys if she had worked with her. I don't believe that she is old enough to have worked with Gaster given her childhood is already taken.

I would put money on sans and Alphys, who we do not know the birth dates of.