The main characters in the 'Rebel Angels Novel' are most likely the rebel angels. They would be the ones driving the plot forward with their actions and decisions. Additionally, there may be other important characters such as the archangels who might be involved in either suppressing the rebellion or trying to understand the reasons behind it. There could also be some sort of mentor figure for the rebel angels, guiding them in their journey of rebellion, or a character who represents the voice of reason in the midst of the chaos.
Since it's a 'Rebel Angels Novel', the main characters are likely to be the angels who are leading the rebellion. There could also be characters who are caught in the middle, not sure whether to side with the rebels or the established order. And perhaps there are some powerful angelic figures who are trying to stop the rebellion and maintain the status quo.
I don't know for sure, but probably the rebel angels themselves are main characters. There might also be some angelic leaders who oppose them.