Okay, so he is immune to the eye. Why was he able to actually connect and shatter her sword? Was it because she dropped her guard? Did the sword naturally shattered because she had been using it on him for a while and it was just time for it break? Also, I guess the sister did her best to prevent him from gaining any kind of strength, given how weak he is. I'm surprised she didn't try to stop him from leaving the orphanage, given he is so weak, I don't see her having any problems stopping him.