Denna

Denna was a Mord-Sith and a captor of Richard while he was in custody of his father, Darken Rahl. Denna was assigned to torture Richard so he would be compliant and provide his father with the text from the Book of Counted Shadows which would allow Darken Rahl to open the Boxes of Orden and unleash the Keeper, thus granting himself immortality. Denna fell in love with Richard, due to his insistence on showing her compassion despite the way she treated him. She eventually asked him to kill her to free both himself from Darken Rahl's clutches and herself from her role as a Mord'Sith. She gave Richard her Agiel as a token of her love right before he killed her.

After the second tearing of the veil of the underworld, Denna returned as a spirit to save Richard from both his own gift and from the mark of the Keeper placed on him by Darken Rahl. She removed the mark by taking it on herself, meaning that she will suffer for eternity at the hands of the Keeper of the underworld. However, her act of sacrifice on Richard's behalf "disgusted" the Keeper and he refused to take her, thus allowing her to join the ranks of the good spirits. When Richard and Kahlan are later separated and seek to know if the other is alright, Denna appears and causes a rift in time to briefly reunite the lovers.

After Richard enters the Temple of the Winds, he is visited by many spirits. Denna is one of them. She helps Richard finally decide to leave the temple and return to world of the living. She does this by forcing Richard to remember the events and emotions of what it was like to be under her control during the Wizard's First Rule.