I know! We're so rare! Coming across another of us is always a pleasure XD

I was wondering if Cerria could perhaps have been on the council at one point in her life?

Perhaps even among those involved in the events surrounding Luciens daughter but as one who argued against the plan?
Following the fall of heaven she would have agreed with protecting humans but been against the idea of setting up the Council in the way it was (casting them as demigods).
I think she would've left the Council not all that long after the fall of heaven though.

Just a note, the original story is gonig to be quite different - though the end result will not be too dissimilar.