[He moves forward a little so that he can catch her if she falls, and he's relieved when she manages to do it without falling.]
That was good for your first time. If you think it would be easier to start on the ground we can try that, although we would need to move away from the sand. [He's glad to see that the experience was a good one for her. After losing one friend, and having that girl arrive here Rei hadn't seemed to be in the best of moods lately.]