Complex sentence: As the series progresses Gaia learns much about her past and develops emotionally to be much more open to people, at the beginning of the series her tragic past has left her scarred and vulnerable to the point that she has completely isolated herself from others.
Split into simpler sentences: As the series progresses Gaia learns much about her past and develops emotionally to be much more open to people. At the beginning of the series her tragic past has left her scarred and vulnerable to the point that she has completely isolated herself from others.