We've seen brides demand that their bridesmaids change their hair color or cover up tattoos in order to fit in with her desired ~aesthetic~, but to demand such adjustments from a guest who isn't even part of the wedding party? Next-level Bridezilla behavior.
A member of the Facebook group "that's it, I'm wedding shaming" shared a text conversation from a woman who was confronted by a bride for having tattoos. The bride didn't even care that the guest was recently in a car accident, and doesn't have the means to get a new haircut and wardrobe for this wedding that she isn't in.
(Note: the people live in the southern hemisphere, where December means summer.)