Okay, I have a really bad side plot idea for DRY
>it is set before the events of DR proper
>Susie appears as one of the classmates
>main characters have to make sure to never involve her in Dark World stuff
>this makes her feel even more excluded and antagonistic
>by the end she may even start warming up to main characters
>unfortunately, she must immediately move to Hometown after that, shattering her first chance for a normal friendship
Weird Route may be about her getting into Dark World and becoming evil, which would completely derail Gaster's experiment in Deltarune.

Cute and funny Susie

Susie if she cute and funny