There is no real vice captain, but the one with the second biggest authority behind Luffy has always been Zoro. He's also Luffy's first crewmate, which alone is a big thing.
When things got really dirty (Water 7, Thriller Bark etc.) it was him, who schooled the rest of the crew (W7, when Usopp had left) and took on Luffy's pain (TB).
Oda speaks through Barto btw, since Barto is the ultimate SH fanboy. What did Barto say about Zoro?
"OMG, that's Zoro-senpai!!!! The man I consider to be the vice captain of the SH crew!!!"
I have zero nerves to take part in a ridiculous Zoro-Sanji cockmeasuring contest, but this one has always been clear.
When things got really dirty (Water 7, Thriller Bark etc.) it was him, who schooled the rest of the crew (W7, when Usopp had left) and took on Luffy's pain (TB).
Oda speaks through Barto btw, since Barto is the ultimate SH fanboy. What did Barto say about Zoro?
"OMG, that's Zoro-senpai!!!! The man I consider to be the vice captain of the SH crew!!!"
I have zero nerves to take part in a ridiculous Zoro-Sanji cockmeasuring contest, but this one has always been clear.