Isabel is a Galvanist, a keen proponent of the primitive technology dubbed 'electricity'. She is rarely seen without her assortment of wooden boxes, or her crossbow. Many of the peculiar items in her boxes are entwined with copper wire. Her delicate perfumes are often unable to mask the feint aroma of ozone.

Isabel's parents were killed in a carriage accident, quite possibly at the hand of the fiendish Duke Marmalade, who is the primary physician to the Royal Society of Physicians. Isabel hasn't caught up with him yet.

Pengellon invited her along on his European Expedition because he was keen to meet her, and to see for himself how electricity works.

Played by Esther.