Sarissa
Species: High Sidhe (former Changeling)
Occupation: Lady of the Summer Sidhe
Maeve's fraternal twin sister and Mab's daughter, she first appears as Harry's physical therapist to help in his rehabilitation. She is bound to Mab, having asked of her a favor. At the end of Cold Days, it is revealed that Mab intended for Sarissa to become the new Winter Lady after Maeve was dead. However, Maeve learned of Mab's intentions and killed Lily, knowing that the Mantle of the Summer Lady would flow into Sarissa, thus thwarting Mab's plans.
Read more about this topic: List Of The Dresden Files Characters, Faerie Courts, Summer Court