((You're the prince/princess of the kind and since you're of the age to leave the castle as you please your father, the king has assigned you a personal guard.))

Right now you're sitting in your room looking out the window when someone enters. It's your newly assigned guard. She had white hair and red eyes, she looks like a tomboy. She gets down on one knee bowing down before you

Guard - Hello young master. I am your personal guard and I'm at your duty.