Originally Posted by parentheses
Also, check out the video of Nami in action next to Kat - Kat seems like she'd be a much more sexualized character but Nami's breasts are much more prominently on display and more obvious: http://www.youtube.com/watch?v=o-CfHApTyBM
Good job OP, noticing that because Kat is on the otherside of the map, she automatically faces the other way, blocking view on her breasts. If the sides were switched I doubt you'd see Nami's breasts either, and instead would be looking at Kat's.
On another note, after reading IronStylus's post I realized "Hey Nami is a mermaid. So is Ariel." Ariel as a mermaid didn't wear clothes did she, besides her seashell bra? Why does Nami have to be fully clothed or look like the most obscure version of a mermaid (e.g. almost completely a fish / monster)? Mermaid by definition is a being with the lower body of a fish and the upper body of a human. I'm pretty sure the upper body of a human doesn't have much to do with fish (No scales, no gills, no fins, etc.) I think the way Nami is portrayed was done very well, and keeps it not only classy, but consistent with the lore of mermaids in general.