Nope, her accessories would be a vinyl cape and a sceptre, that's it!
Oh well, I've nothing against vinyl cape and a sceptre, but .. since the woman was in some way a phenomenal temptress, I admit that, talking of her imperiallingerie, actually I was thinking about something like this ..
Spoiler Alert, click show to read:
.. consider that, coming from Piazza Armerina mosaics, such a sophisticated sexy mise would be also fully historically accurate and absolutely fourthcenturysque in style ..
And now, one my last unit, the equites sagitarii clibanarii, a super heavy cavalry vexillatio, fully protected (horses too) and armed with bows and kontos.
Late roman army was overspecialized, and as good pragmatists, the romans adopted the war specialties of their enemies by constituting units from prisoners of war.
They sent them to theaters of distant operations and capitalized on their skills by integrating Roman recruits.
Obviously in that case those units were created by sassanids prisonners, as their names indicate, and prefigure the Byzantine cavalry.