User blog comment:Kaido King of the Beasts/Chapter 813: Up in Vinsmoke/@comment-24850639-20160121183327

I was hoping for some actual story progression after they got out of Bege's body since the letter turned out to be so anti-climactic, but Sanji was my saving grace this chapter. This is my favorite element to see Sanji in, and we don't get to see it enough. Not the hilarious perverted womanizer, or the angry guy on fire, but the suave, calm, and collected secret agent that's always one step ahead even when it seems that he's not. He immediately assessed that they must be aware of his bounty poster and who they'd be fucking with if something happened to him, so he never had any reason to be concerned for his safety. His friends on the other hand were a different story, and they could have easily hurt them to bend Sanji to their will. He played his own trump card that he wasn't even planning on having, and used Caesar as a meens to keep his friends safe. Not only that, but he used his Kenbunshoku haki to assess his surroundings even WHILE he was in someone else's body. So even if Caesar wasn't enough, Neko would have tore him in two if he tried something, already under investigation for Pekoms. Not to mention how quickly he figured out how to get his friends out of there, despite still being in the process of seeing what the Shiro Shiro No Mi can do. And now Caesar could be of even more use to him, given he'll probably have access to his powers. Sanji was masterfully badass this chapter, so that alone gets it a thumbs up from me.

Sure, we were all hoping for some more world-building with some hints about how powerful the Vinsmoke name is, but I'd say we got more than we realized this chapter:

A) Vito's Secret - Bege/Big Mom know SOMETHING in regards to Sanji's family that changed his mind from saying fuck their invitation, to HAVING to go. I think either they're keeping someone important to him hostage as a bargaining chip, his family has done something that he can't ignore, or they know a some more really big secrets about him that he doesn't want to get out.

B) The same person that arranged the marriage pulled the strings for the wanted poster. We're assuming its his family, but who did it doesn't matter so much as WHY. This person wants to wed the Vinsmokes into the Charlotte family (Big Mom's) family.....WHY? Big Mom is a fugitive of the World Government, so there has to be something REALLY valuable that they're getting from this. Is it some sort of business arrangement?

C) Sanji's lack of enthusiasm to see his own family, and Brook's added footnote about the journey required to get to East Blue from North, to me highlights that something tragic definitely happened in Sanji's family history. Not too many people in the show in general, let alone the crew have actual "flesh & blood" family still alive, so I think him not getting along with them is a REALLY big deal. Sanji's disposition towards women seems really deep rooted in his past, and it would have been before he met Zeff, so I think his Dad is big influence.