User blog comment:Swordbirth18/My Miscellaneous Reaction/@comment-24850639-20151013150822

Well I think one thing that's really gone over people's head's is Sanji's blood type. Chopper said it was EXTREMELY rare. Perhaps that's part of it. I do think he's someone extremely important, but why do they want him alive? Doflamingo has a secret that could shake the very world itself to its core, and he def knows things about Mariejois and what not that they would not want made public. Even then the WG doesnt seem to care much about what happens to him. Sanji must know or have something very valuable.