Was re-reading some chapters in the manga and my interest was peeked a bit at some of the similarities between Nami and Portgas D Rouge. Total speculation and a lot of it is just by imagery mostly since we don't know much about Rouge still. Here are some of the photos. First one is from a cover art where Nami is brandishing a very identical flower to Rouge. https://imgur.com/a/aE5c4 Second one is just the similarities in their faces, as well as the tangerines that are spread across the floor. http://imgur.com/a/ljSaJ Third is kind of hard to see since the picture is so tiny, but when Nami was crying for Luffy after Ace died, Rouge face was drown quite similar when Ace was born. https://imgur.com/a/zQcAC My other part of this theory is that Portgas D Rogue was the previous owner of Luffy's Gum Gum fruit. Main reason I think that is how else would she be able to keep Ace in her uterus 20 months? He wouldn't have stopped growing, and the only way to accommodate that would be if her womb could expand. This is kind of a secondary theory and possibly the most "out there" but I think Nami might possibly obtain a devil fruit down the road. After seeing Monet during the story, we get this cover art of the crew building snowmen. https://imgur.com/a/TMljl It's clear the one on the right is Luffy, the one on the left kind of looks like Nami due to the hair being similar and large bust size and what not. Only thing is, I don't think she would actually eat it, but possibly apply it to her climatact. I can't see the reason why Nami would risk her swimming ability to gain devil fruit powers. Shes a navigator and it has shown that she loves the sea and to swim. Franky has seen Vegapunk's blueprints so there's a good chance that he knows how to incorporate devil fruit into weapons. curious what your all opinion on these are.