Francci's joining was based on comics, he joined in Shuidu, and Qiao Ba, a ship doctor, joined before him.
At the beginning of each sentence, the cartoon has roughly explained where everyone except Luffy went. Sauron was bounced back to be with a woman with a ghost, bounced back to a kingdom full of transvestites, Nami met a meteorologist, Francci was bounced back to a winter island, Robin went to a prison to work as a coolie, and I forgot about Wu and the skull. Comics are arranged with a purpose. Basically, during this period, they each improved their combat effectiveness, and finally they will return together under the guidance of the life card.
In short, comics are the main ones, and comics are also the most exciting.