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was a Japanese Naval Marshal General and the commander-in-chief of the Combined Fleet during World War II,.
In Chapter 19, the Gun Bidden Trade Federation attackers of the Orte's
fleet shout "TORA TORA TORA" as they are victorious, their leader
claiming "the admiral" told them to do that. It would suggest that the
famous Japanese admiral is present in the manga, but this has not yet
been confirmed. Same with his allegiance, but siding with living humans
hints that he's a drifter.