Joker Lady is the nickname given by players to the leader of the Relentless slavers who appeared in Ther'avare on Day 13, named so for the markings on her eyes that resemble a Harlequin's makeup, as well as the "Glasgow Grin", or scars extending up from the corners of her mouth, which make her resemble The Joker as played by Heath Ledger in The Dark Knight.
She demanded that the Tei'kaliath produce 22 slaves for her to take back, since they had come to Ther for the squatters who had been displaced by the Tei'kaliath the previous week.
When they Tei'kaliath sprung the Slaver Ambush Joker Lady fought back and stabbed Quel, fatally wounding him. After an extended skirmish she and the remaining slavers surrendered, and she was herself enslaved by the Tei'kaliath and given into the care of Slave master Khan'zalika.
While a slave Joker Lady proved to be very uncooperative, including an attempted escape on Day 15, and eventually escaped into Chel'el'Sussoloth on Day 62 to 64. Her current whereabouts are unknown.