User blog:S.C. Amigo/Theory on the 4th Yonkou.

[http://images1.wikia.nocookie.net/onepiece/images/9/94/Yonkou.jpg

So, as we know, we are well informed about Shanks and Whitebeard, and know a small bit about Kaidou. However all this time, the 4th one has been virtually unknown. Now, thanks to Garp, we have a vague picture of this person. Now, in my theory, I select the top figure as the unknown. Take a look at the face. It is wide, has curly hair, and a big smile. Now, take a look at the Giant Oimo's face:

http://images2.wikia.nocookie.net/onepiece/images/a/a9/Oimo.png

As you can see, both him and this figure have similar faces, except for the nose. Now, Oimo is from Elbaf, the land of Giants, and based off the Vikings of old. During those days, women were who married to wealthy and powerful men usually were fat as a sign of great influenece. Also, notice that slight mark on the face, common amonsgt European nobility of those days long gone by.

Ergo, my theory is that the 4th Yonkou is the Queen of Elbaf, or at least a Noble. True, this makes her a bit similar to Boa Hancock in practise, but like Mihawk to Shanks and Moria to Kaidou, it is also my theory that Hancock and Elbalf may have been rivals at one point.

Now, it is true that Giants may not have been shown with Haki or eat much Devil's Fruit, but I think she has either one or both, or has some sort of seastone armor + weapon to deal with powerful people like Logia users.

Thanks for reading.