The reason why Ron did not want to move together with William and the others was mainly because he had many secrets which he did not wish to reveal. Moreover, although the swamps were dangerous, Romo had given him special treatment previously and he knew that there were many natural treasures in this place. Also, although he was on good terms with William and the others, he was not a student of the Sky Blue Magic Academy after all. It was even their first time meeting each other. It was not possible for him to have complete trust in them. They might abandon him directly if they were to really encounter dangers. It was better to separate now, so as not to hurt the harmony. Also, although there was strength in number, any natural treasures found would have to be shared equally. It would be better to search alone.