This one can become very confusing, which makes Morgan a wonderful character. One of the most powerful Seelie, she is part-Fae, part-goddess, and total badass.
Sometimes I use her other names -- Morrighan, the warrior, or Crow, the collector of Fae souls lost in battle, or Maerigan - Queen of Nightmares. More convoluted is she represents not one person, but sisters Badb, Macha and Nemain. She is a confusing and confused myth and when she is in the story you must pay attention.
All Fae deal with personality disorders, shifting between images and living for eons, but Morgan defines multiple-personality.
Her introduction in THE SEVEN GATES is tame. I truly hope there is more to come from her.
Oh -- one more thing. She's married to Cahal's father but she is no mother.