Ego and Will.

Ego is complex (structure) in psyche (psyche is greek word for mind-soul).

In Jung's theory ego is gradually created, from beginning of life, central consciousness (awareness?) complex, "me", around which there's more or less large consciousness (awareness?) field.

Ego, subject of consciousness (awareness?) Is created as complex measurement, consisting of inherited predispositions, and of unconsciously gained impressions.

Ego organizes and regulates how consciousness (awareness?) works, gives sense of inner integrity and separation, more or less.

Speaking of ego empirically, we have on mind different measures and aspects of consciousness (awareness?), more or less individual, structure and basic functions.

Will, defined by Jung is result of all energetic processes of consciousess (awareness?).

The higher level of ego's development, the more energy, willpower it can use. To be clear: larger ego is often less developed, integrity and reduction are in my opinion to make ego better.