A Holy Ghost was once a human who has passed over, accepted Truth and to abide by Yahweh’s sovereign laws and is of positive energy. They are also referred to as Holy Ghost Observers and fight on Yahweh & Christ’s side of the Spiritual War in bringing vindication to Father’s name.
A Convert, was also once human but rejected truth and the abiding of Yahweh’s sovereign laws and have in fact converted to Satan’s way of thinking. They are of neutral energy but by default the Convert is considered to be on Satan’s side of the Spiritual War.
Then you have the Holy Angel, and the Fallen Angel also referred to as a Demon. The Holy Angel is of positive energy and on Yahweh’s side of the Spiritual War and the Fallen Angel / Demon is of negative energy and on Satan’s side of the Spiritual War.