That boy is X Drake brehs.
"A named character whose face is hidden, with all evidences pointing to being Drake.
Since it'll come up in the chapter thread, here's a easy copy pasta template.
1. The pirate Diez Barrels. The family name Diez is how "X" in X Drake is read. It's clearly written whenever Drake shows up in the manga, with the exact same spelling. (ディエス) He is a former marine gone pirate.
2. The pirate has a cleft chin, shared by Drake.
3. The pirate angrily calls "Dory" to bring booze, to which the young man replies "Right away.." The boy looks miserable from what we can see.
Drake is spelt in Japanese as Doreeku, Dory would completely match how nicknames are named in One Piece.
4. This is taking place in North Blue, where Drake hails from.
I mean, Oda didn't skimp out on hints here."