Luce's maids and butlers will most likely be dressed like
this, probably to remind him of home or something who knows. If you'd like to be invited to a lovely gory party that'll happen at night IC, be free to find and recieve an invitation from the workers. The invitations will be vague, and say something like:
"Club Plasma is hosting a party tonight at 8 PM. You have been invited!"
The workers are oddly zombie like, with dull eyes. They rarely respond to anyone who isn't Luce, so they'll probably just hand you the invite and leave if you wish to get one~ I suppose only humans and vampires would be getting these as well (maybe witches? do vamps drink witch blood?)
I hope this is okay, Fortune!