Curse of the Crimson Throne
The pair was known for their extravagant parties and their passion for rumors and gossip about Korvosa’s upper crust.
When they threw a party in the midst of the blood veil plague, however, their mansion was raided by a crazy necromancer. Dressed like a harlequin, she cackled and started to shoot crossbow bolts at the guests.
Those who were hit quickly succumbed to a ghastly disease that looked much like blood veil and then were resurrected as zombies to act out scenes in ghastly mockery of a party.
Olauren Carowyn was one of the unlucky victims of the insane sorceress, raised as a zombie but destroyed later on when a patrol of Gray Maidens did a sweep through the mansion.