You were a princess of a kingdom in Britannia, and you had to go to Liones with your family on business with the king. Prince Tristan of Liones and his group were sent to accompany and protect you. Once you arrived in Liones, your parents immediately went to speak with King Meliodas, leaving you alone in Liones Castle. You were alone on a castle rampart, gazing at the sky, until a voice spoke.

Chion: "You shouldn't be wandering around alone."

You immediately recognized this knight; he was in Tristan's group that had accompanied you and your family to Liones.