Rin's pov:

I watched him run around taking tests before removing the wires off me. "Master what are you doing with your mouth?" I asked him wondering what the strange look on his face was for. He made a soft sound before looking up at me. "It's called smiling Rin." I processed the new word I was given trying to figure out what it meant. "Smiling?" I said testing the new word out. He nodded and smiled some more. "Its when you lift the corners of your mouth up and show what you're feeling. Like I am feeling happy so I am smiling. It's an emotion that humans feel." I processed the new word I was given. "Emotion....processing" My eyes lit up green as I worked this into my brain. He made the same noise once more and I grew more curious. "What is that?" I asked him making him look up at me. Suddenly I could see myself inside his green eyes. No they weren't just green, they were a vibrant color of green one that I couldn't pull my eyes away from. Master was uninformed by my question so I rephrased it. "Master the sound you have made I do not compute." He did it again and then looked away for a moment before looking once more. "It's called laughing Rin. I have a lot still left to teach you."