This is Joanna Szatecka (Instagram) (photo: Fine Art Wiktor) and her cosplay of the female Despotic Tyrant player character from the RPG/strategy game Dominion of Darkness – Dark Lord/Lady Simulator: https://adeptus7.itch.io/dominion
She is a LARP organizer: https://www.facebook.com/BialyGryfLARPY
I thank her very much!