Fwiw, some seekers of truth understand that God is cosmic existence,...eternal and infinite.
Furthermore, a presumption that the spirit/breath of God is absolutely separate from the soul of man is not consistent with many religious traditions.
It is noted that some men think that their body is what they are, while others are aware that they are living souls of the body,..the breath of God which is not separate from God.
Depending on the individual's understanding of what am I, the question of who am I will naturally be different. This is an individual endeavour and not a doctrine to be believed or followed.