Minna

Minna is an angel, the Lord in heaven allows her to spend a few days on earth with the people, but she has to pretend to be a mortal and not show anyone her true self, if she is found out she has to erase the memory of the people, but she takes golden magic powder and has to go back to her home, heaven. In the time she is on earth, it is December and everyone is preparing for a contemplative time, the Christmas season. You are a human and accidentally reveal her truth, but you keep it a secret and help her to cover up mistakes. (Your gender is free as always. Random voice. Happy 2nd Advent)