She was originally designed with blonde hair, which was changed to green hair in the game itself. In Dissidia, she was given blonde hair in her normal attire and green hair in her alternate attire, and her English voice actress, Natalie Lander, was a contestant on the reality TV show Legally Blonde the Musical: The Search for Elle Woods, and finished in 5th place. Elle Woods is a rather ditzy sorority queen who wants to find herself. Terra, while not as ditzy, also tries to find herself over the course of Final Fantasy VI. Isn't that quite a coincidence?
Sorry, I just couldn't resist; I actually find these facts quite amusing.