From my understanding, the soul preserves your memories and essence, but not your learned behaviors and expressions. They are eternal, granted upon birth (or conception, depending on arguments), and never age. I think souls are sort-of able to have their personalities, but our actual physical existence is merely a window into the soul, and damage can distort that window and render it imperfect, preventing our "true self" from shining through.
Souls are eternal and can't really "age" - they do not deteriorate or acquire any of the drawbacks we'd associate with being "old". They can accumulate experiences and grow in wisdom - and this is the basis of those with an "old soul", who are said to have knowledge beyond their years and what not, because they have some access to those memories.
This is my understanding of the general concept of a soul, anyway - it doesn't grow so much as it "accumulates", and it can't be damaged any more a damaged cell phone hurts the person on the other end. Brain damage can result in faulty transmission - aberrant behaviour. But the soul remains unchanged.
I honestly think the only way the movie thing would work is, again, if you consider "us" the
characters the actors play, while our souls are the "actors" that bring the characters to life.
The problem is that words like "us" and "I" are a bit vague because we're discussing the nature of self and self-identity. When you use "I" in a sentence, are you referring to your physical body, your mind, your consciousness, an "immortal soul," "the observer," some combination of these things...or...what?
This isn't the analogy breaking down. This is us discussing a concept that is more subtle than the words we're using to describe it can easily convey.
"I" is usually the totality - all of those combined. We can certainly use other definitions though, if they are more useful?
But I agree with the thrust of the analogy, that being that we don't blame the creators for stories where bad things happen, because no one "really" gets hurt - and if our souls, the part of us that is actually "important", is immortal, then the same could easily apply here.