After this barrier of water had formed around the boat, the little girl turned back to Lin Fan and Mo Ze Chen with a smile as she said, "Now we can finally have a private talk."
Lin Fan and Mo Ze Chen were both looking at the barrier of water that had formed around them before turning back to the little girl.
They could tell that this barrier was at the level of the Child Soul Realm and unless Lin Fan charged at it with his full power, it wouldn't break that easily. However, if he were to do that while they were on this boat, it would definitely destroy the boat as well.
While this could be considered a barrier that blocked off outside interference, it could also be considered a barrier that trapped them inside. If this little girl wanted to do something to them, they definitely would be in for a hard time.