Where did you hear that?
We were create in the image of God.
That means we are the children of God just like he said.
We are the same species.
There are other scriptural references to pre-mortal life.
Where in any biblical work does it say we are angels? Or that angels are what we become.
We are created in God’s image. No argument there. If we are different from angels, then they are evidently not made on God’s image.
Your original question was about the battles in heaven beteen the Angels and Satan’s folks. I am not really debating the existence of our souls before our earthly existence.
We are the same species.
I will rise in agreement with Vermont Lt. The Fallen Ones (fallen angels) came here and laid with the daughters of men, and that union produced giants (Nephilim, Titans). If we were the same species, such an offspring would be unlikely.