actually i don't think anger is there mostly in where they're at since instead of snowdin its raindin where everyones depressed and its raining endlessly so instead of being angry i think SF!muffet wants to kill themselves but SF!papyrus just makes her happy as best he can since they are childhood friends in my headcanon of this au



and for SF!grillby i think he would try to rob you and do anything to take your money even with a simple scam