Undertale AU Idea: The First Shall Be Last (Spoilers)

Instead of Chara, Frisk is the first human to fall. They become good friends with Asriel, the Dreemurrs, and monsters in general, like Chara - but they never come up with Chara’s “buttercup” plan, or anything similar.

As the years pass, six other humans fall, and they also befriend monsterkind. The Underground is happy. Frisk, now old and wise, lives peacefully with the Dreemurrs. The other humans have made homes of their own. Asriel is set to be coronated king. But when an eighth human falls, and they don’t behave quite like their predecessors, things get a little complicated.





Other tidbits I came up with:

The carrier of the blue SOUL was more violent than the others (note how, in-game, the Old Tutu is described as “dusty”), and they were eventually killed. (Gerson coming out of retirement?) They were the first and only fallen human in this AU to die of unnatural causes.

Two of the fallen humans were siblings. (This tidbit was inspired by the fanfic The Scientist, where the cyan and orange SOULs are said to be siblings.)

Another two of the humans eventually get married and have a child. (The child would have a blue SOUL, “replacing” the blue SOUL mentioned above and rounding out the “SOUL rainbow.”)