Imma tell ya guys about my fnaf au if u don't see this I'm doing this on YT as well!
Fnaf 1:
1.) Yea u know about the missing kids and William killing them BUT, glitch controlled William to only kill Charlie.
2.) When he killed the missing kids, Cassidy tortured William in heck so he regrets killing both of them.
3.) He doesn't regret killing any of the other kids
4.) Cassidy is nicer to other people then William