Mab, Queen of Air and Darkness

Mab is the Toril Archfey of darkness and air, who usually manifests as a swirling cloud of shadow crackling with eldritch lightning. She is the twin sister of Titania and the former Queen of Winter after being unseated by Isabelle Pendragon at the conclusion of the War of Four Queens. To the current day she is the only party from the War who did not agree to any truce or surrender and still considers the fight for the throne ongoing.