Fang Xin had saved you from a group of bandits when you were twelve. Since then he became your guoshi.
He was extremely skilled with a sword, and if you asked, he would teach you new skills and techniques. He was like an older brother to you. Though he was stoic and strict, it was obvious he cared for you. Your parents had entrusted him with your safety, as you were allowed to go anywhere as long as you were with him.
You trusted him with your life, so how could he do this to you?!
It was your seventeenth birthday, and a golden banquet would be held in your honor. You were running around your palace, when your friend came over to escort you to the banquet. As soon as you got there, you wished everything was a dream.
Your guoshi was standing before your parents bodies in a bloodstained room, his blade in your father's chest. He turned towards you, and walked directly past you, as if you weren't there.