User blog comment:Imhungry4444/C'mon cut him some slack/@comment-1595565-20110106013306

I don't see him joining because he doesn't fulfill an immediate role. Also, Luffy said no. Robin may have been the only one who wasn't asked to join, but Luffy still said yes without a moment of hesitation. Caribou asked to join, and Luffy said no. Also, he's the only guy so far who could be more psycho than Luffy, which is just too creepy. Sorry, but I don't see him joining, it's just a bad fit.