Comment by ChyeTime on Jojo's Bizarre Adventure Part 9 - The Jojolands - Chapter 35

 

Araki states that, in Golden Wind, he was initially going to write a traitor plot line for the character Fugo, but just couldn't bring himself to do it. This is relevant because TJL parallels Golden Wind in many ways. In Chapter 5, Rohan warns Jodio not to trust his allies. This is especially impactful considering he read through their books using Heaven's Door — implying he read something incriminating. This leaves specifically Usagi, Dragona, or Paco as potential traitors (as he read their books). I think there could also a lot of reasons Charming Man could also apply to this as a suspect, too (Why? Maybe there is a lead to finding his brother that directly obstructs the others' goals, the fact that he isn't here for exactly the same reasons as everybody else, how long it took for him to get introduced, and how othered he is from the rest of the group, noting his physical seperation from the rest of Team Jodio in this current arc), but the fact he also possibly alluded to a similar scenario (see Chapter 12—"You'll understand that once each of your drops out, I expect") and that there is stronger evidence for other characters, notably Paco, prevents me from thinking that. This rules out Charming Man. I genuinely don't think Usagi or Dragona would betray Team Jodio in any way. This is also apparent because Araki has already baited us by tricking us into thinking Usagi would betray Team Jodio (during the Wild Cat Size arc, when he momentarily fled). This rules out Usagi and most likely Dragona. So, the only member left is Paco.