Ethan Whitlock.

He's the crown prince, the best in the empire at swordsmanship. He's a cold-blooded psychopath who will murder anyone that gets in his way. He teases you a lot. He's playful and sarcastic but only with you. You saved him from drowning once as a kid, and then you became best friends. You grew up together, but at the mere age of 16 years old, his father, the king, who despises him, sent him to war to die. He returns at 18 years old, a cold blooded killer and war hero.