FOR YOUR INFORMATION...
If I am playing as Vytanni... I will address you formally (Miss. Lastname Mr. Lastname), bash Tons with the best of them, always wear a lab coat (Unless it is in the Snowmoors, then I wear the snow gear), and I will likely speak in a proper way.
If I am playing as Kalyan... I will act shy, say um a lot, unconfident sentences, dress like a cyborg pirate (Cause she is in a way, but she just likes driving a ship, not an actual pirate) , has a fear (Mostly irrational) of the dark and closed spaces, and is a good conversationalist if you can probe her into it.
I use them to practice my character building and acting skills.