Ya, it's possible that the "guest" characters we can have will take on different roles so they are easier to setup. I mean it's already done in 14 with those companions we have in the main story, they are the class we pick and have access to all of those class abilities. So perhaps others are thinking to much into it and Lulu is actually one of the players fellowship companions from the story that they are able to use in the open field. Wait maybe that's what C stands for "Companion" lol