mmmmm sanji can married anyone remember violet?
Rebecca would have never join: her dream was to have a peaceful happy life living with soldier-san/her father... And Kyros didn't wanted to fight nor kill anymore... Dressrosa royalty (including Violet), originally, they were pacifists...
Although I admit that my favorite One Piece princess is Vivi... She wasn't a strong fighter and sometimes she was scatterbrained... But to me she is one of the bravest women and she strawhats loved her A LoT.
Is that a possibility? :D If i remember right Luffy wanted a crew of 10 people ^^ If sanji really marries Pudding would he bring her with them? :D That would be kinda romantic xD and his lady days are over x)