A name-etymology install: the two new siblings’ names are read aloud on-page as their birth-order numbers, retroactively recasting Sanji’s long-buried san-ji name as one slot in a numbered family set. Folds with the long-burn Sanji - name foreshadows Vinsmoke third-son birth-order reveal (the 18-year name-encoding) — that note tracks the full five-sibling pattern; this one tracks the @0826 “0 and 4” extension and its forward engineered-birth payoff.