Photo by: Nepetakittycat I was going through the megacon tag and someone linked to their photobucket album and said to go ahead and save and repost photos of yourself as long as you give credit so I did! Thank you for taking a lovely photo of my Gilda Griffon cosplay, nepetakittycat!
These are either ready for wear or they are easily adapted by wearing for instance some arm sleeves or an amira hijab underneath.
In the case of the Colette picture (top left) you could wear either a period mobcap, an amira hijab + sunhat (Scarlet O'Hara style) or perhaps just a hooded cape.
For Charlie (the top right picture) you could wear a hooded cape instead of the crown or just wear a wimple/medieval veil underneath the crown, kind of like Princess Isabelle does with the red/blue gown in Braveheart.
For the Wild West outfit Dean is wearing you could just wear an amira hijab under the hat and maybe instead of pants/trousers under the coat, you could wear a skirt instead.