I reckon that in Brook's flashback long before this, when he was "travelling" as pirate with Shuri in tow, the latter was already a kid? but now, in the older flashback Shuri was 14?
I reckon that in Brook's flashback long before this, when he was "travelling" as pirate with Shuri in tow, the latter was already a kid? but now, in the older flashback Shuri was 14?