I don't think she does, but it's hard to really find much information. Usually if an actor has a tattoo, it gets covered up with makeup for a character unless they can work it in somehow, but then again, characters rarely have them as part of their character unless it's a significant point due to the resulting amount of makeup needing to be done to create a fake one.

I've always been curious about that tattoo. Now that I'm able to see it better, it looks to me like a very stylized lotus flower.

I know this is a major bump but I got a better screenshot of the tattoo just seconds before she gone to Eywa.
https://sona-gaming.com/Tattoo.png

Makes decent sense for Grace to have a small tattoo of a plant :P

I...I....this is why fandoms scare me.

Now then who wants to hear about how I extrapolated the meaning of some of the markings inside the TARDIS and how they prove that the Whoniverse takes place in the same setting as WH40K?

...I don't think anyone extrapolated meanings from it, we're just wondering what it is of (and whether or not it's part of her character). ¬_¬

I know I was just being my usual snarky/self depreciating self. I'll bash on you guys for being nerdy THEN talk about my even nerdier pursuits.

Its just who I am. Though I can see how my sarcasm gets missed.

Sorry, that was my fail :P

I understand the tendency of fandom to run to great lengths to work out significance of tiny things - although I just want to know what her tattoo is of! :P

What I think is really interesting is how the majority of characters main and random have some kind of tattoo from when their arms/neck are visible - a subtle yet realistic acknoeldgement that they are gradually getting more accepted as they become popular.

I love that we are noticing the small things in the movie, whether they are deliberate or not. I really don't think JC would let something like an inappropriate tattoo slip through in one of his main characters; so it is not insignificant. I think it could be a moth. Have just checked out moth&myth and some beliefs start to sound pretty relevant. In Europe it is a symbol of death; in Jamaica it represents a "soul not at rest"; in Hinduism it is believed that a moth "dies a living death" when it falls into a flame. What think you?