(Pending — Yamato’s eventual alignment with the Straw Hat side is forward of this window.)
Earliest known caller
(Not recorded.)
Why this matters
A character/parallel seed: Oda repeatedly codes future allies through a Luffy-recognition beat and an inherited-will parallel. Luffy’s instant Ace comparison flags Yamato as ally-coded — but the read is a soft, speculative alignment claim, so it is priced conservatively.