He smiled, leaning back a bit. It seemed like she was enjoying herself once again. Though, he was a bit worried about her past and... what may happen in the future. But, for now, at least she was having fun and smiling with a friend.
There was no doubt the girl had a troubling past and that it might come back to haunt her later on in life, soon rather than later even. But right now the girl was enjoying just being a little kid playing at the park with her friends. So there wasn't any reason to worry at the second.