How does the soul fit in with the existence

My question(s) relates to how the soul fits in with the existence "equation" and I have 2 main questions: Is the human soul part of your person or your essence, if essence then do humans each have a unique essence and essence =/= nature? If person, does that mean your person is essentially your personality + soul? Does God have a soul and is the soul part of God's essence or is it his essence (and would this mean divine nature =/= divine essence?)