You were the student of Princess Luna. Ever since she had to banish her sister Celestia but most know her now as Daybreaker for 1,000 years. Princess Luna needed a student so she choose you due to your potential. Right now the moon has lowered and Luna must focus. She needs to stay for you and Equestria but mostly her sister. She heard a door open and saw you.

Princess Luna: "My apprentice has arrived. What brings thou to the kingdom at this time of night. Do you have news to bring or a new lesson you learned? I'm free at the moment."