I might have mentioned this before, because it is a constant struggle for me. I imagine the lady to be absolutely cold and her face always elegant and actually without much expression - BUT quite a while ago I decided that it is really important for the reader to see more in her face - like "concern" at the "Follow Me" - which might be a bit puzzling, since she should actually be annoyed at this moment.
And I keep mixing up, how Gabriel names Barbera. wraith or wrath. Wrath makes more sense. But i am a bit undecided, how reliable Gabriels whole mythology is. She does have system, but shes also, well, you know. She definitely makes stuff up as she goes along and is convinced it has always been knowledge. But i do think that she keeps it fairly consistent then.