Hi everyone, I'm looking for some advice for a fairly last-minute cosplay!

I'm thinking of cosplaying Siri (Warbreaker) next Thursday - world book day, where a few of my friends and I are running a little Brandon Sanderson stall in our library's world book day event, and I'm a bit stuck just because I need some ideas for different types of dresses to look at for a suitable Siri cosplay - I've been rereading Warbreaker for ideas but I don't really have much to take away from that in terms of Siri's different outfits seeing as there's simply so many. Does anyone have any ideas for what sort of things to look for? Any help would be SUPER appreciated, tysm! :)

btw, idk whether this counts as warbreaker spoilers or not?