User blog comment:Black Leg Sanji/Kaido appearance prediction/@comment-2229670-20101213221056

What Kaido or related words mean? There must be some meanings.

Kaido's and Kaio's kaio means "emperor" or something like that, while Kaiho's means "sea" (same kanji that is usually read "umi" in shikona).

Source: http://www.sumoforum.net/forums/index.php?showtopic=2845&pid=28001&mode=threaded&start=

or

The Shimanami Kaido (“kaido” - literally means “sea road”) is an expressway which links the main islands of Honshu and Shikoku through a series of bridges and islands.

Source: http://cyclemumbreeze.blogspot.com/2009/09/touring-in-japan-shimanami-kaido.html

So.... maybe a sea emperor, I kinda want him to wear a crown... i'l think about other physical appearance later.