Hilda Egglebrecht was the ancestor of Agatha Egglebrecht. The Soil Stradivarius was loaned to Hilda before the Great War. As a talented musician, she was asked to join the artistic and musical elite in Vault 92. During her time in the Vault, she was likely involved romantically with Parker Livingsteen. Her fate is unknown but she was invited to a romantic rendezvous in the studio in which two skeletons can be found.