simple wedding gowns with long sleeves

I found this dress for a wedding coming up (different story altogether and also deciding between blue and purple), but I love it so much, and if it fits, I want to also wear it for Wellygeddon as an cost effective cosplay. But I don't know what kind of accessories or which anime/manga I want to associate it with, or make it semi original (another different story). Any ideas of what I should do with it, or what I should make to go with this kind of dress? simple wedding gowns with long sleeves

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