Sigh, I keep going back and forth on this shit.
This scene to me really is confusing as fuck on both ends of the argument, but I really feel like its far more justified if its just Shanks.
1. If its a twin, why is he wearing a cloak in Mariejoa (and now again this chapter?) Sure, i get the twin appearance argument, but thats also easily explained by Shanks having dual roles
Also this dude is wearing a white collared shirt under the cloak, just like Shanks:
2. The dialogue also just....doesnt make sense? They ask him why he's there, given his standing. If he's not a dual role God Knight/Pirate, why ask him this if its just his twin whos a God Knight that resides on Mariejoa? Why would a God Knight need to "travel all this way" if they are upper level CDs who clearly deal with CD matters in Mariejoa?
@ArturCantSpeakJapanese super torn on this after really going through this scene again. The red herring is like 3d chess on fan expectations at this point lol, but him actually having a twin complicates this scene completely.