Installs the Ace-Blackbeard pursuit arc-grammar — Ace is not a passing traveler, he is a commissioned hunter of one specific pirate. Pre-loads the Whitebeard-Pirates-internal organization (forward-canon: Blackbeard was a Fourth-Division underling under Ace’s Second-Division Commander tenure; Blackbeard murdered Thatch for the Yami Yami no Mi and defected; Ace pursues him in violation of Whitebeard’s standing order do not pursue Teach). The Drum-arc’s off-page Ch. 133 Blackbeard-Five-Pirate conquest is load-bearing precisely because it is what brings Ace through Drum a week before the Strawhats arrive — Oda has been pre-building the Ace pursuit toward this chapter all along.