Diane Enright is Tori's mother. She is a witch and also a financier who donates money to Lyle House, shown in an excerpt to have influence over even Davidoff.
She has one other daughter named Lara who's most likely a witch and an unnamed husband. She dies in The Reckoning, she is distantly related to the Enright's that work for the Nast's.
Several times throughout the story she is seen badgering her daughter for being mentally ill, fully aware that she is a witch, as well as framing Tori for the death of a guard that she had killed in front of everyone and slapped Chloe across the mouth.
Diane dies in The Reckoning and Chloe controls her body in order to shoot Dr. Davidoff.
Tori's reaction after her mother's death was unemotionally simple with the quote, "ding dong the witch is dead."
Diane after death makes an apperance in Kelley's short story Facing Facts where she sought out revenge on Chloe.