Mass Effect 1. Timid, unsocial, over analysed as a nervous habit.
Mass Effect 2. Cold, deadly, resourceful, driven by personal events she keeps secret, brokers in information to gain the power she needs.
Redemption is the in between and is supposed to tell us what happened that made her this way. Like I said, only saw 1 of 4, but it didn't help me see a transition, it showed me Duke Nukem with tits and blue skin.