When a game session can't be won any longer, there is a chance to reset it. Do you remember what I said about creating ourselves through the game? In the same way we also created our ancestors!

A "dancestor" is someone who is a descendant on one side of the scratch and an ancestor on the other side. Essentially when you create a scratch your universe is reset with one difference: the birth order of yourself and your ancestor.

So, the session before ours failed. In that session, Karkat was one of the ancestors of Kankri - after the scratch, Kankri became the Signless, and was the ancestor of Karkat.

[ she's just going to stick with Karkat as an example because yeah ]