I don't like the idea of Etta being in the military, but I'm sure there is a way to do both. But remember, the fun part about Etta is that she is all those things while also being audacious and quirky. She puts herself in front of Diana to protect her, even though Diana is obviously far more powerful and is in no danger, while Etta is. She also has this unique love of her own body and nobody can make her feel insecure about that.