Board Thread:Fun and Games/@comment-28914075-20160722183027/@comment-27059826-20180416230021

Frisland87 wrote: Theory: Toriel and Asgore are direct family (parent and child or siblings).

Proof: They look like each other. This might sound like itdoesn’t prove anything, but it does. In Undertale, every time two monsters look like each other, they are confirmed or speculated to be direct family. Except Toriel and Asgore (and the Gaster followers, tems and random encounters, altough it might count for the last group too. I’m not sure). Even Goner Kid is speculated to be Monster Kid’s sister, and the green fire npc in Hotland is said to be Grillby’s daughter. So why do Toriel and Asgore look so much like each other, while there’s so many different monster species? Because they’re family. You might use the tems as an argument for the two just being the same species, as there are quite a lot of tems, but then I have a question for you. Why are tems the only species of which there are more then three?

...I’m sure you can still easily debunk this theory, since I didn’t do much research... Goner Kid is male.