Deirdre Kendrick was the first daughter of King Tristan and Queen Robyn Kendrick. Deirdre was joined one year later by her sister Alicia. As they grew up, Deirdre was often openly hostile to her sister, apparently already suffering from doubt and inadequacy that she channeled into rage. She was taught by Kaene, but he stopped when he understood the void in her heart.
In 1365 DR, Sinioth seduced her. At first, Talos used Deidre in a positive mode, sending her to stop the Ityak-Ortheel and to save her father from sahuagin. However, afterward, Deidre became a complete pawn of Talos and the storm god used her to start a war to conquer the isles. In the end, Deidre was killed by her sister Alicia Kendrick.