Bran waited, pacing back and forth silently as he wondered and worried about whether she'd suspected something wasn't right. He knew that he couldn't do this for much longer, because he knew very little of her past and eventually the time would come when she would realize this imaginary voice didn't know as much as her subconscious should have. By then, though, he hoped to have inspired an enjoyment for singing that she wouldn't abandon once 'the voice' stopped coming.
Her song choice actually made him laugh, but it was too low for her to hear. It wasn't mocking or derisive - it was one of those rare laughs that wasn't often heard coming from him, a sound of genuine amusement. It was certainly a light-hearted song, and despite the lingering hesitance it was much better than the previous song. Perhaps it wasn't right of him to make her sing something so fitting to Christine and Erik's story.
"Good." The praise in his voice was evident, and he was pleased. "There was no fear there, you see? Hesitation, yes; but that will disappear with practice. When you sing, you need to sing like that. You know it is much more than just words, so prove it to whoever may be listening. You will be practicing, yes?" Even though he knew she wouldn't say no, even if to say otherwise was a lie, he wanted to hear her say it.