"make me a doer of this good deed, and let him kill me an he will: I shall only die a ransom for others."
I knew from the start that I wanted to contrast the colours of Scheherazade and her sister, and contrast the colour of the aether/magic with the colour of Scheherazade's costume, so I went for a warm red and orange colour-scheme. Most of my time was spent on her wedding night outfit, but I also made a few variants for what she'd wear on subsequent nights, in case their assassination plan failed.
The aether-stone glove is not merely a decorative piece; it is a source of magic power, which in Scheherazade's case is being used to poison the edge of her knife and the needle in her ring. Her earrings actually has the traditional symbol of the Sassanid dynasty on it, as a nod to the claimed origin of the story.
In the original story, the framework is that king Sharyarh - betrayed by his wife, who is unfaithful to him with a slave - is so enraged and broken-hearted by this that it turns him into a monster; he first slays his wife and the slave, and then slaughters woman after woman, for the crime of being women. Through Scheherazade's tales (which seem to be mostly about deceitful women and the good men they betray), he learns to trust women again, and decides his serial killing days are over.
I decided to be a bit... literal in my interpretation of this. King Sharyarh's broken heart is the catalyst for the entire story, so I gave him a mechanical heart. It is powered by the same kind of aether-magic as Scheherazade's glove, but instead of poison, it pumps through his veins and keeps him alive. As shown in the full illustration, he hooks it up to a machine that replaces the fluid and purifies it
Dark blue to her sister's warm reds, Dunyazad's outfit is less ornate and a bit more restrained, to keep from stealing attention away from her sister. In the original story, she is crucial to the plot - it is her presence that allows Scheherazade the excuse to tell a story, and survive til morning - and in my interpretation, she is the one who smuggles the knife into the bedroom, in case the poison needle fails.
Please let me know what you think! :)