Question about ethernal bonding

[Enkidoh]

Remembering back to my own wedding, there is a npc in the bride/groom changeroom which you use to access the hairdresser (the paid wedding ceremonies even give you a free ticket to change your hairstyle at that time, and in fact you even get a new hairstyle unlocked with the wedding), instead of calling the hairdresser with a crystal bell.

You can also make last minute changes to the aspects of the ceremony by accessing the Registry book on the table in the room, but you need to make sure your fiance's choices also match, otherwise it throws up an error. You do not have access to your retainers though once inside the bride/groom changeroom so you have to make sure you access them from somewhere else before entering the Sanctum.

Either way, congrats on your engagement!

EDIT: Hmm... I just checked my screenshots, and the Ceremony Concierge just explained about how the ceremony works, and the Registry is only for finalizing the ceremony's details, and does not seem to have any option to change your hairstyle. So, I'm afraid I'm going to have to concur with Canadane, that you need to make sure you've already changed your hairstyle and make sure you have your wedding attire in your inventory/Armoury Chest before entering the Sanctum, otherwise you will be unable to get this equipment once you enter the changerooms sadly.