Tess was born in York but was studying her doctorate in Chemistry and Botany when science just stopped working. She was suddenly forced to start working for the government but before she could start she escaped and ran. Lacking survival skills she was in dire shape when Daisy found her – For Tess is was love at first sight. It was about 7 months later she noticed the gills appearing. She has made her own tests (in the bath tub) and inwardly scolds herself for not having a more useful mutation.
She is brilliant at creating new medicines and making the most of what she has.