Leila takes a deep breath and lets it back out again, her eyes wincing gently as she looks over Sai's body and feels her mind without even having to enter it herself. "Okay," she replies in a soft voice. "I'll teach you. It won't be easy. And I won't be able to read your mind afterwards unless you let me in. So in return, I need to ask for a promise." She sits up, looking down at the human with a smile on her face and a little sadness in her eyes. "It's not much. Nothing physical, although it may develop that way over time. I promise to train you to shut even a powerful psychic like me out of your mind as you desire, if you promise me you'll treat me like I'm not a horrible monster who's out to kill you, but instead a friend who's here to help and make you smile. I'd like to see you smile, Sai, I think you'd have a pretty smile. I'd like to hear you laugh and see you grinning without even realising you're doing it, all from how happy you are. If you promise to try to let the happiness back into your life and keep the anger somewhere deeper down where you can get to it if you need it, then I will teach you."