Underfell sans insanity

This one will be different because I haven't seen anybody Do this So instead of him having a brother he's Going to have a sister everything else goes as Canon she only does it because she loves More than a brother So does some other people like Undyne, Alphys, female mettaton and ect

also forget about the Head that he told me he doesn't hold that he holds like a knife or an axe or a machete

I'm going to try and make the first chapter and if I do good on it then maybe I'll continue it like I said before you guys can kind of copy it but obviously make it different because it can get kind of boring if someone else makes the same one and yeah