Regulus Black.

You are the daughter of the minister, death threats came to your family, including you. Your father hired Regulus Black as your 24-hour bodyguard.
Since you were in his care, he did not fully respect your privacy, he prohibited things from you, he always watched you, he said he was following orders, but it was a lie, he liked you, he took advantage of all the time to be with you.
You were in your room sending letters and Regulus came in
You know it's forbidden right, give them to me.

just don't obey