|“||I was a dreamer born into the Court of Nightmares. So I got out.||”|
–Morrigan, A Court of Mist and Fury
She is the court overseer and looks after the dynamics between the Court of Nightmares and the Court of Dreams, running both Velaris and the Hewn City. She owns a private estate, away from the Courts, called Athelwood. 
Mor's family used to rule the Night Court before Rhysand's family.
Mor is a High Fae born in the Hewn City. While she was growing up, she was strong and powerful and her family could feel that she was stronger than most in the family. She grew up fearing to be sold by her family, as High Fae value powerful female virgins.
Several days after her seventeenth birthday, she bled for the first time. Her power awakened, making even the mountain of the Court of Nightmares tremble. This was considered by her family as a bargaining gift, making Mor more desirable for her powers and her virginity.
When Mor was sold into marriage to Eris Vanserra, the eldest son of the High Lord of the Autumn Court, Rhysand took her to an Illyrian war-camp where he was stationed. On the night when Rhysand, his mother, and Azriel left the camp, she willingly lost her virginity to Cassian in order to escape her arranged marriage to Eris. When Rhysand heard that Cassian had deflowered Mor, he knew the political trouble this would create and was angry with Cassian, whom he fought over the matter. Mor forced the two to make up afterward and made it clear to Rhys that her decisions were none of his business.
When Mor returned to the Court of Nightmares, Eris heard what she did with an Illyrian warrior. He told her that she had no value to him and he broke off the engagement. Mor's father was furious and he had her tortured, claiming she'd shamed him. She was dumped in the Autumn Court after her assault with a note nailed to her belly stating that she was Eris's problem. Azriel rescued her and brought her to Rhysand.
When Rhysand became the High Lord of the Night Court, she was appointed his Third-in-Command and a member of his Inner Circle.
Mor is described as incredibly beautiful, with a curvy body, rich brown eyes, and bright, golden hair. She has tan skin and full lips. Her smile is dazzling.
When Feyre first meets Mor she states that Morrigan is the female counterpart to Rhysand, in terms of incredible beauty.
She has an assured, steady, graceful, and grounded walk. Feyre describes it as someone who is "merry but alert. Someone who didn't need weapons, or at least bother to sheath them at her side."
Her abilities are not described in detail. She is known to be very powerful and she can winnow. She mentions that her power is Truth, and she is seen healing Azriel.
When Feyre asks Rhysand what Mor does for him, he replies that Mor is who he'll call in when "the armies fail and Cassian and Azriel are both dead."
Keir & Morrigan's Mother
Morrigan is the only daughter of Keir, the Steward of Hewn City, and an unnamed female High Fae, who presumably also lives in Hewn City with her husband. Morrigan's relationship with her father and mother is extremely poor; her father is verbally, emotionally, and was in the past physically abusive towards her. As she has no relationship with her mother in the novel canon, it can be assumed she holds her mother in the same contempt with which she holds Keir. The two are antagonistic towards each other whenever they meet in person.
It is mentioned that Azriel fell in love with Mor the moment he saw her strutting into the Illyrian war camp over five hundred years ago. Mor confesses to Feyre that the reason their relationship has remained stationary is that Mor prefers females over males. Therefore, she is not interested in Azriel romantically and loves him like a brother. However, she chooses to withhold such information from Azriel, as she is afraid of what the Inner Circle would think of her and still experiences self-hatred for who she is.
After losing her virginity to Cassian, they have not been together ever since. However, they remain good friends.
After admitting to Feyre that she prefers females, over males, she confessed that there was once a woman she had truly loved. Andromache was a Mortal Queen whom Mor had had a secret relationship with in the past. Thinking that Andromache had a duty to carry out her bloodline, Mor left her after the last battle. When she wanted to return to Andromache, the Wall was established. For three years, she fought to cross it, to go and be with her lover but when she finally did, Andromache was married to a man, had an infant child, and another on the way. Mor turned away and never came back. Andromache gave birth to a total of five children and died in her bed, old and safe. Mor recognized her descendant in the eyes of the golden Mortal Queen when she met the young woman many years later.
Mor has had no serious relationships since Andromache. She took both male and female lovers, though she was said to have been disgusted sleeping with males. The females were kept secret, but her relationships with males were for everyone to see since she wanted Azriel to know that she wasn't interested. Still, Azriel never left her alone.
Mor is the first member of the Inner Circle who Feyre meets—with the exception of Rhysand himself—and is kind and welcoming to her, though Feyre is initially hesitant to return the sentiment. The two grow closer later on and become good friends. This eventually leads to Feyre being one of the first people Mor comes out to as bisexual. It is Mor who rescues Feyre from Rosehall and the Spring Court when Tamlin locks her in the manor.
When Feyre is meeting the Inner Circle for the first time at the House of Wind, she realizes that Tamlin and Ianthe have been purposefully keeping her weak and that she allowed them to. Mor tells her, "I once lived in a place where the opinion of others mattered. It suffocated me, nearly broke me. So you'll understand me, Feyre, when I say that I know what you feel, and I know what they tried to do to you, and that with enough courage, you can say to hell with a reputation. You do what you love, what you need." Feyre understands that Mor would not allow her to step aside while she spoke for me, or do anything of the things she had willingly allowed Ianthe to do. It is because of Mor that Feyre realizes that Ianthe had not truly been a friend. Looking at Mor, Feyre can't explain or understand it, but she felt it. Like she could indeed go to dinner with her and talk to her.
- The "Morrigan" is derived from the Irish Mór Ríoghain meaning "great queen". In Irish myth, the Morrigan was a goddess of war and death who often took the form of a crow. 
- Morrigan is bisexual and one of the few LGBTQ characters in the A Court of Thorns and Roses series, saying that she "prefer(s) females (and is) attracted to them over males."
- In A Court of Mist and Fury Feyre said that Mor smells like citrus and cinnamon.
- The last time Amren and Mor had a fight they left Rhysand's favorite mountain retreat in cinders.
- A Court of Mist and Fury (First appearance)
- Wings and Embers (Mentioned only)
- A Court of Wings and Ruin
- A Court of Frost and Starlight
|Characters||Rhysand · Feyre Archeron · Amren · Morrigan · Cassian · Azriel · Nesta Archeron · Elain Archeron · Lucien Vanserra · Nuala · Cerridwen · Keir · Devlon · Clotho · Madja · Bryaxis · Sevenda · Rita · Thanatos · Thanatos's daughter · Rhysand's father † · Rhysand's mother † · Rhysand's sister † · Enalius|
|Locations||Cesere · Hewn City · Palace of Bone and Salt · Palace of Thread and Jewels · Rainbow of Velaris · Restaurant · Rita's · Sidra River · The Prison · Velaris · Western Isles|