I think you didn't think much about your avatar (just like me). I also think your real name is Lea. Were it inspired by the Star Wars character, you'd probably use Leia instead of Lea. So you picked your avatar to have something visual for your username and that was the first that came to your mind. To me that avatar says "I'm a proud, strong princess". You ooze a bit of sex appeal with that posture and it goes along with your statement "Who says I can't defend myself?". Both that response and your avatar signal assertiveness. You didn't pick princess Leia as a sex slave or Leia among her friends. You are alone with the universe. You also picked a cartoon/drawing and not a real frame from the film which says this is more about archetypes and ideals rather than sci-fi fetish. And it hints towards playfulness and innocence. The innocent girl within the strong princess.
I was thinking how impressive your goals and accomplishments are. All the best to you, Lea.
Posted on my own page... oops