New kingdom with a tyrannical authority and so a new princess.
We had Vivi for Alabasta
Shirahoshi for FMI
Viola and Rebecca for Dressrosa
Pudding for WCI
Hiyori for Wano
And now, Yamato as the princess of Onigashima. Complete with "Nami face" to boot.
By Kfunk
There's Nami face, and then there's
Nami's face.
This is probably the clearest indication that it's very unlikely she'll be joining the crew for obvious reasons. Makes no sense to design two main characters that would frequently be interacting around one another to look so similar.
Not only that, but Yamato's entire character is centred around ignorance. Yamato does everything she does because she wants to be Oden, believing there to be no one left to inherit his will. She is just about to find out that Momo, the son of the actual Kozuki Oden is still alive and that his scabbards are there too, inheriting Oden's will and planning to open up the country. It would be reasonable to expect a change in her character since the reason she "became" Oden is because she believed there to be literally no one else who could. But it turns out that there are tons and tons of others that are in the exact same situation as her.
The blatant next nakama teasing however, in addition to the postponed banquet only makes it all the more likely that we truly are getting another nakama by the end of this arc.
And out of all of the candidates Yamato's the only one in which the groundwork simply hasn't been laid for her to join at all. Regardless of what happens, I won't see her as anything more than a red herring at best.