I think you are quite vague in describing the dark side of Maggie. What did you experience within her darker manifestation?
I’ve experienced the darker manifestation of my succubus spouse and even Lilith herself. Their physical manifestation were solid, cold and their energies went inwards similar to how science describes the functionality of a black hole.
This is similar to my succubus spouse dark manifestation:
But since her intentions were not to harm or scare me, she was very gentle and careful in her Grudge-like manifestation. That also means she was in total control of that manifestation. Other spirits could lose their control and change direction to feed off of the emotional reaction, instead of threading carefully.
A highly advanced succubus - and other kind of spirits - can control their manifestations without triggering fear, anxiety and other negative reactions and they can easily stop if they feel that they went “too far”. If a spirit can control their impulses within any spectrum of manifestation, I consider them to be very powerful. That means, if their target ask them to stop, they revert their darkness immediately and goes neutral.
And, yes, they can be very emotional and take things to heart.
There’s even reasons for some spirits to not reveal their true manifestations too early, because some of them have been rejected. Even divorced. Isn’t that a shame?
I think you don’t have a reason to fear Maggies dark side. On the other hand, I think Maggie fears the darker side of herself, because maybe she can’t control that part just yet.