Silvers Rayleigh

Sabaody establishes this structure beautifully.

Rayleigh is there as a living remnant of Roger's era, while the Supernovas gather around him as representatives of the future.

There's almost this sense of historical convergence in Sabaody, that people who witnessed the previous age are encountering the people who will define the next one.

Marineford is where that transition becomes violent and irreversible.

[laughs]

... a former pirate and friend of Hachan's.

Shaki, as she is called, reveals that she has been following the Straw Hats' exploits, and she tells them that the engineer, Rayleigh, isn't currently around.

The group decides to search for him, and Shaki warns them that there are 11 rookie pirates with over 100 billion berry bounties on them that have reached the Red Line.