Talk:W. D. Gaster/@comment-31862306-20170713150810/@comment-32195515-20170808204544

Technically it's not proven if it's a theory.

But, yes, there are reasons to believe that Papyrus and Sans are Gaster's  left and right side of his brain and yes you do have to beware of Sans and Papyrus as they both try to kill you in the Genocide run and at the very least threaten you in the Pacifist/ Neutral run (on the date with Sans he says that the only thing stopping him from killing you was his promise to Toriel) and the fact that Payrus tries to electrocute you as well as Sans' interest in science alongside his use of Gaster blasters may tie both of them to Gaster solely because those may require the use of electricity and Gaster created the core that provides the whole of the Underground with electricity.