Lady Darlessa Lannister, born Marbrand is the first daughter and sole surviving daughter of Lyonel Marbrand by his first wife Lelia Spicer. She was supposed to marry Stafford Lannister, who refused her in favour of Elyana Martell, and Darlessa was wed to Kevan Lannister as to maintain good relations.
She and Kevan have a small son, named Daven Lannister.