So about sending your own dryad around, when sending her to the void castle, she does not sell you anything just gives you money. Could there be an option to move her so i can buy stuff from her?
For The Void Castle not sadly. Each location you send her to has little differences, The Void's Brothel option removes her store (Note her items are still available in other stores at a slight higher price) but her Vb gain is doubled. So it's a small trade off.