Someone new, and has a weird accent, and has a connection with one of the SHs. And has a "huge wound" in his back...
Let's use logicks!
-He's waiting for "that man", so that rules out Nami and Robin.
-He has a "huge wound", so that might rule out Sanji, Chopper, and Luffy, who don't really cause flesh wounds/scarring.
-So we have Usopp, Brooke, Zoro, and Franky left.
-Now, Duval said he's been waiting his "whole life" for revenge. So either he's a lot younger than he looks, or a lot older (having antagonized Brooke).
Hmmm.....
Camie's facial expressions are great. LOL