Fixer upper (camilo madrigal)

Meredith Tudor is a 15 year old who lives in london with her two older sisters, Elenor and Melissa. her family is hiding a secret. All three of their children are magical. The two girls hide their powers successfully but Merry is more powerful, she cant, so she starts to live a double life. A Royal by day and a warrior by night. what happens when she gets shipped off to marry some kid she has never met to fix her?