I always thought the Dark Lady was malevolent and a faerie that saw the darker side of life, balancing the dark and light side is her primary aim. I read for an ex and she was the first card that came out and her eyes were glowing red. She didn't like me using my faery deck to read for this guy that was a narcissist so I read for him from the Dark Tarot and now cannot ever use that deck again lol
I had the dark lady come out this morning after I asked a question about a man. Her eyes did not glow red this time thankfully

but I was told by her that I already knew the answer to my question and I just have to go inside and the answer will be found.
I have always found her fascinating and she speaks to me about learning to balance the dark and light side of ourselves and also to look within for answers as we do know best and our intuition (as women) is high. Also trusting the universe that answers and help will be delivered.
I love her (not as much as himself - or solus) but she is a close 3rd