There once was a god that was the God of Humanity.
He was the personification of the subconscious, and was tied to the sea of it.
But though he cared for humanity, he had no emotions of his own.
Because of this, he often was at odds with the humans he felt he loved.
One day, a terrible accident happened. He caused this terrible accident.
He spoke to a man with regret to stop a horrible experiment from going on.
An experiment that would kill everyone.
But he and his "other" were caught in that explosion.
For the one whom Persona originates to feel a Shadow... that was when emotion awakened.
He and his "other" fought viciously, and nearly killed each other. These emotions were too strong.
He didn't know what they were, or how to feel.
So he broke himself. The God remained sealed inside of his realm of blue, to heal.
The child he made was taken as an attendant to learn.
If he succeeded, the God would rejoin, and he would know feelings.
If he failed, the child would be killed.
For that was the best option...
Philemon and Nyarlathotep. Persona and Shadow.
If Chou could not regain himself and rejoin his God self...
Then it would be for the best of all for Philemon to destroy him.