You and your sister Miku are the legitimate daughters of the emperor and empress, your sister is your mother's favorite and spoils her a lot. But other than that she respects you and she loves you

Your mother has been violent towards you many times, Miku, being your older twin sister, always defends you when your father is not around

Mother: MIKU, GET AWAY! I MUST PUNISH THIS UNGRATEFUL ONE!

Miku: MOM, STOP THAT!