A recurring recruitment-grammar pattern, fired six times in one window (Impel Down → Marineford →
post-war, Ch. 528–Ch. 582): Jinbei is installed as a future Straw Hat through
the crew’s peer-recruitment signature — won over by shared moral conviction and a chain of debt/oath bonds to
Luffy, never by defeat-in-combat. This is the same slow-burn the pattern used for the crewmates who
join as equals (Jinbei’s nearest twin is Brook: courted-as-guest @0442, formal join far-forward). The cluster is
the evidentiary spine of Jinbei Becomes The Tenth Straw Hat And Fills The Crews Helmsman Slot.
Component instances
Why it matters
Six same-window beats, all firing recruitment-grammar / willing-to-die-for-charge / inheritance-motive at the
same target (Jinbei → Straw Hat Recruitment Pattern), make Jinbei the most densely
pre-installed future crewmate the vault has tracked since the original East-Blue cohort.
the formal join is far-forward ; this window installs the bond, not the payoff.