In the Murkmire Malevolence, Leilatha Vencaryn baited Helly into walking into a bear trap, but the doll tore straight through and ripped into the Elf. She returned to her station as the elf fell, but Leila was rescued by Ellenor Breatham, who shut and locked the door.
Helly was a Living Doll synthesized by the Fold, one of many such dolls created as their Mages learned to make vessels that could theoretically house Virathul. A Spirit-Construct hybrid created through Undead energy, Helly was considered a failure, no more powerful than a Scarecrow with limited sentience. Though she once lived, she had no memories of her life, but kept a naive and dutiful personality.
Produced in Cliffsunder, Helly was given to Fold initiate Alda Arkin as a gift from Vex. She was kept in the curator's office in the Cliffsunder Museum of Natural History, attacking any creatures that entered the office after-hours besides Doctor Alda herself.