In Break-In At Bleak End, Hollyhock was informed that four members of the Whistledrop Crew were set to break into Bleak End, seeking Prisoner 13. Her time gathering information at the Glitterati's request came useful: she provided each a sliver of a sapphire, which displayed the Bleak End Magical Map and functioned as arcane keys. Hollyhock provided all of the helpful information to the crew, including guard postings, prison features, as well as plan on how to get them inside.
Having already acquired a list of upcoming employees bound for Aone Island, she went over the best fits with the crew of who they could replace. She then helped them knock out and kidnap the employees in the dead of night, taking them to the hull of the Jolly Dodger. Mercy took the place of Mica Langelo, Ellenor Breatham became Kennekelle Palmer, Nessa Nina Quickpick Rumbauld Pennyluck became Persimmon Copperpot, and Punmiri Tel-Phaeun became Yula Stormwhistle. Hollyhock formed the plan with the Crew then sent them on their way, posing as employees on the Rocking Seal.
They returned to Farrozandmar having successfully acquired a copy of the Dwarf-Door Tattoo Key, and she introduced the Crew to Sassafras Flashlashes, a Gliteratti member sent to check on her. Mercy privately informed Hollyhock about their recovery of the Bleak End Records of Imprisonment, and that they knew of her role as an informant. The Crew chose to keep her secret, however, and earned an ally in the process.