Think you're overexaggerating irritation for fear, but that still doesn't counter my point, regardless.
And the point is, if the OP world knew, even if was very vague, there was a World King, perceptions of other characters would change. Would Whitebeard and Kaido be the World's Strongesr Man/Creature respectively if knowledge of Imu was commonplace? Or Mihawk as the World's Greatest Swordsman?
But a character who rules from the shadows should be more like a Larloch figure then a Yamun Khanum, for those famillar with Fogotten Realms