Was that hinted somewhere? 🤔
Nami made the equivalent of a no-homo joke with Kalifa, otherwise there's no hint to her being a lesbian.
As for who Sanji ends up with, it'll be Pudding if anyone. Nami already said she didn't want to marry a pervert in Thriller Bark, and there's no real potential with Viola.
Oda straight-up devoted an entire arc to building up a relationship and potential for the future between Sanji and Pudding, idk why people still think anyone else is a possibility for Sanji.
I still think that Sanji and Pudding need to work on themselves for a few years before any possible romantic relationship happens for real between them.
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I think the best ships for the Straw Hats in general would be Luffy/Nami, Franky/Robin, Usopp/Kaya and maybe Sanji/Pudding, if Oda ever decides to give some focus on romance beyond WCI. Zoro needs more actual interactions or hints at least with Tashigi or Hiyori for me to support either possibility.