Kanna had indeed created a body for herself, following her emergence from the Pure Land. To her question about the nature of her birth, her father responded that she should have a look at it herself. So she did. She probed his mind for the moments leading up to her entering this her birth, and from his perspective she had opened her dark eyes and when this had happened, there was nothing else after a few seconds. She thought about it more, and for the first time a smile came to the emotionless girl's face. "So, you did want me. Gomen, I was upset because I thought you abandoned me, and I didn't know why Haku got to stay, and I didn't." she mentioned thinking about it. In those few seconds the girl seemed to shake off completely the influence which had come from So'unga.
Find the young boy's discomfort at her side, she smiled at him again, thinking it best to explain since he wasn't probing her mind for information. "I don't know for certain, but it seems you might be carrying the weight for both you and Kanna physically. And inversely she's probably been carrying both your chakra, since she doesn't exist here physically. If it is the case, it explains why you are a bit smaller than you should be for your age." she said feeling the need to give him an explanation since he didn't have one already. "But there is no explanation for why that would be the case..."