Oda debuts an officer’s power by effect + epithet first, formal fruit-name later. Jozu’s diamond body is
shown blocking Mihawk’s strike — an instant scaling of a Whitebeard commander against the
World’s Greatest Swordsman — and the “Diamond” epithet does the naming work in-panel. Pair-reads with
Marco’s blue flame, demonstrated unnamed in the same chapter
(Marcos Blue Flame Power Demonstrated Unnamed).