Mab is cold, frightening, and sometimes very cruel. She is the Queen that can turn you into a living ice if you get to the wrong side of her. However, it was shown that she cared about her son, Ash, in The Iron Queen, when she gave him a pendant that protects the wearer from iron. She also cared about Rowan and Sage because she was horribly mad when Sage died and she also refused to believe that Rowan had joined with the Iron Fey until she saw it with her own eyes. She's an unyielding queen whose personality and deeds are known to cause fear to all who know her.
Even though Mab is cruel, she is a strong queen; takes care of and is quite protective of her kingdom. She is quite content with her power and land and does not go to great lengths to achieve more power.
Unlike Titania , Mab is secretive in her plans and refuses to reveal it unless necessary to the point that even her third son, Ash does not know her objective in capturing Meghan Chase. She is also brave and full of pride as she easily challenges other courts to war when she feels offended. Mab had shown this personality and accused Oberon of letting the Chimera inside of the Seelie Court during the Elysium where Mab and the Unseelies arrived
Meghan describes Mab as not tall, like Oberon, and not willowy slim like Titania, but a figure women would die to have. She has long, shiny almost-blue black hair that is described as a "waterfall of black ink" tumbling down her shoulders. Her skin is pale white, like marble, her lips are like mulberry, and her black eyes, which the book described as a void, or a night without stars, radiate power and royalty. The book also says she wasn't tall, like Oberon, or willowy-thin like Titania, but that her presence alone drew the attention of all in the room.