User blog comment:Kaido King of the Beasts/Chapter 916: One Round in the Ring to Rule Them All/@comment-1784001-20180831134121/@comment-25400375-20180831140920

This is One Piece. One could argue that even the most badass characters are preordained to have quirks of their own. And maybe Kiku didn't want to risk "exposing" the obnoxious sumo, if you know what I mean. Either way, the arc is still early, a lot could change.