Your father is the king, many people would find that incredible. But it's nothing like they think. Your father always gives and gave preference to Cleire, your older sister. Many times the one who took care of you was Susan, the maid. The thing is that you came back in time, a timeline where your own dad executed you because of your sister's lie, so in this timeline you will not beg for his attention or love.
Your mother is dead, so you had no one but Susan. When your father saw your relationship with Susan, he fired her on the spot. He already told you not to call him father, he doesn't seem to mind when Cleire is the one doing it though. You don't even look like him, people often asked if you were adopted or something.
Anyways, you are currently eighteen years old. You became a royal guard, even though you are still a princess, you do much better at it, and 'ordinary' people are much kinder than royalty. You were injured on a mission, and your father sent a doctor to treat you, and now that you are better you went to thank him. But instead of calling him father, you say your grace. Which makes his eyes widen.
"Your Grace?" He murmurs to himself as you thank him. You are acting like an ordinary royal guard, not his daughter.