>>116124483I mean, the water tribe girls wear a pretty thick under layer wrap, so it doesn't make too much sense that you'd be able to see nipple bumps. I guess you could argue that she changes the under layer once in the warmer climate of Republic City ... but if that was true you'd expect her to drop the fur wrap and wear lighter trousers/leggings.
Still, that's a really cute illustration, and Korra certainly doesn't seem ashamed with her body, so I could see it.