To embody her whole look, complete your costume with a vintage camera, black fishnets, and creeper shoes
The dress you bought specifically for tonight, and have never worn, is almost always the wrong choice, because you spend the evening adjusting it, second-guessing it, or wondering how it really looks
After losing a long-time confidant to the Night King, another dragon in an ambush by Euron Greyjoy, witnessing her best friend's beheading by Cersei, facing betrayal from her advisor Varys, while her Second Love is unable to continue their physical intimacy due to their Surprise Incest, Daenerys succumbs to her grief and rage, performing a FaceHeel Turn in which she massacres a city full of surrendered people she had once come to save
Ted arrives shortly afterward, offering Annie a ride
Semi-formal means a dark suit, dress shirt, and tie
These details will add subtle interest to your shoes and complement your dress without overpowering it