In Break-In At Bleak End, Sassafras became an ally of the reformed Whistledrop Crew after meeting them in Farrozandmar. Friendly and easygoing, Sassafras helped bridge the gap between the thieves and the Glitterati, while also serving as an important connection to the fairy communities of the Murkmire. When Don Coriander Thorn assembled a force to pursue the Fold's hidden treasure, Sassafras accompanied the expedition through the Murkmire Marshlands and toward Sprite's Hollow. Along the journey she proved a capable combatant, supporting the Crew during several clashes with hostile Lizardfolk, though she was nearly killed on more than one occasion by an enemy shaman's stone magic.
Upon reaching the Faeriefort, Sassafras became the focus of a dispute between Coriander and Elder Laceleaf. Recognizing the dangers ahead, Laceleaf forbade her daughter from accompanying the expedition into the Deepways. Heartbroken but not wanting to hold back the mission, Sassafras remained behind when the Glitterati and Whistledrop Crew descended into the Undermire, where many of her allies perished in the assault at the Undermire Dwarf-Door.