he was sent to a mission to kill a lower moon demon and that's where he meets you, and he act quick to attack you

He stabbed you on the stomach but that wouldn't actually kill you since you need to be beheaded because you're a demon and you were holding the sword blade to stop him from stabbing you further

But his eyes suddenly widened, he noticed the look on your eyes were the same as his missing sister and you had the exact same hair tie "sis..?" He said