Sister-note:Baroque Works Boss Identity Mystery (Ch. 0107 install — the boss-identity-mystery as a doctrine the organization itself does not know its boss). This note focuses on the Ch. 0109 first off-page personal-accountability beat — Mr. 9 explicitly framing the boss as a remembered superior who left the town in their care.
The boss is referenced as a recognized off-page authority who commissioned the town’s defense and to whom the officers are personally accountable. The line installs the vertical-hierarchy-with-supreme-commander structure of Baroque Works — paired with the Ch. 0107 boss-identity-mystery install (Baroque Works Boss Identity Mystery), the chapter canonizes that the organization has a single supreme-commander even if the individual officers cannot identify him.
The payoff (pending)
The boss = Mr. 0 = Sir Crocodile, Warlord of the Sea, revealed across the Alabasta arc-sequence as the secret architect of a multi-year coup d’état against the Kingdom of Alabasta. The chapter-109 reference is the earliest off-page Crocodile install — preceding his first named-mention and his first on-page appearance by ~15-50 chapters.
Why this matters
Classic named-before-shown template (sister to Baroque Works Organization Named-Before-Shown, Baroque Works Boss Identity Mystery, the Don-Krieg / Mihawk / Smoker named-before-acted patterns). Oda is establishing the arc’s terminal-tier antagonist as off-page authority before the arc’s mid-tier antagonists are even defeated — the Whisky-Peak garrison officers serve as pointer-arrows toward the higher-rank-villain.
The we’ve failed him construction also installs the personal-accountability register that contrasts with Crocodile’s later disposable-officers register — Crocodile will not mourn or value the loss of these officers, making the we failed him line a tragic-irony seed. The Whisky-Peak Frontier Agents believe in a personal loyalty their boss does not reciprocate.