Matilda Grimm was the sister of Basil Grimm and the great-aunt of Sabrina, Daphne, and Basil the Second. Matilda was an expert in the story of Rumpelstiltskin and documented facts and her own theories about the Everafter in her book Rumpelstiltskin's Secret Nature. This book provided vital information for the plot in The Unusual Suspects when Rumpelstiltskin himself aimed to dig under the barrier.