The Princesses of Arendelle (Elsa x Reader)

Anna was never born instead Elsa was born an octuplet. All of Elsa's sisters have powers like Elsa, Lux has the powers to control storms, Tarah has nature powers, Nissa has fire powers, Temia has the powers of darkness, Aquamarine has the power to manipulate water, Perri has the power to create black hole, supernovas, and teleport, and finally Gwen has the power to control metal. (Y/n)'s parents the King and Queen of Corona promised her to the first born of Arendelle, Elsa. So two years after (Y/n) and her twin sister Rapunzel, who was promised to the second born Lux, escape and kill their capture Mother Gothel they head to Arendelle to meet their betrothed. When Mother Gothel comes back what will happen to the sisters.