You had been, for a good while been having a hard time with assassin's trying to kill you. It was like no matter how much you tried you never were safe. Even if you were protected by ever knight in the Castel, you were still scared. But Zen knew what would help. Obi. His guard, and previous assassin. You were nervous at first..but he was truly nothing you  had expected. Zen truly trained him well. He seemed so well mannered..maybe, just maybe you could evenchally trust him to watch you..maybe.