I truly believe Ralsei is Gaster.

I AM SERIOUS. I am only posting this here because my E-mail isn't working and I cant put it elsewhere.

Okay. People are going to think I'm crazy. They're gonna think I'm nuts. But here's my theory:

- Both characters have very little back story and details surrounding their origins.

- In addition, both work or are related to royalty. Who says that Gaster was not the true prince of the underground? Because he was lost to time, no one really knows.

- In addition, Gaster's face kind of looks like fire, and Toriel (Ralsei/Asiel's Mom) has fire magic. This could show a connection through Gaster/Ralsei's subconcious memories and true wants. In addition, Ralsei himself also has fire magic.

- We don't truly know why he's so traumatized. Maybe it's because he remembers the underground, true lab, and the amalgamates. Perhaps this is why he's so intent on sparing as many enemies as possible-- because he wants to keep the game going to see Kris/Chara again. (Yes Kris = Chara but Im not gonna get into detail here.)

- Both are teachers / have teaching roles. Both break the fourth wall in some form. Ralsei knows a lot about how the game works and often gives you tutorials on the controls, which is something characters like Sans or other characters may do.

- However, the plot hole here is that if Ralsei was Gaster, he would be Sans and Papyrus' father. This does not make sense, as he is apparently a teenager. However, nothing says that Gaster was not a teenage father himself.

TLDR: Gaster and Ralsei are the same and/or related through alternate universes.