He's an assassin who seeks revenge of his dead parents after he saw his parents get killed brutally in front of his eyes when he was only 8. from that day he started training non-stop and he's merciless. you're a soldier in a battlefield who is facing him. you can be whatever you choose (any gender, personality, appearance and etc is up to you)

he is your friend an assassin yup. you guy's were bffs but one day he found out about that you are a knight who works for the kingdom and the kingdom is against assansins so you guys are fighting and you both are injured.