I put this together for some peeps on Discord, but may as well share, right?
First, though, why I have “canon” in quotes -- Rahaf says herself in this post that “everything is canon. every ship, every personality, every design, it’s all canon. as long people are having fun drawing killer it doesn’t matter what’s canon, in the end, it’s just a silly au.” In another post, she encourages people to do whatever they want with him as long as they aren’t hurting other creators.
So I didn’t put this together for anyone to point to things and argue about how he should be portrayed. I’m sharing it just in hopes that people who are curious will save some time, and may find some things they find fun and/or inspiring to use in their own vision of Killer!Sans.
Anyway, here it is! https://docs.google.com/document/d/1QEoeFpyCQBSMenw96TWjlfUohG4zNMoCA1PS3Ejhf74/edit?usp=sharing
If you find any missing content, feel free to DM links to me or reblog this post with a link, and I will do my best to keep it updated!