I think some of it's hair.

[Korra lifts one of the long, ombre toned bits and shrugs.]

I was a troll for a while, and it was the same thing. The weird long, long hair or fur or whatever on my arms and legs and at my hairline. And these.

[She gestures to the mineral veins that run through her now. At least she's had all this stuff before, it's just weird having it and her werebear stuff.]

But I am definitely the furriest person you know.