Cass was brought up in Blairgowrie, spent some time abroad after education and has lived in Glasgow for the last 10 years. She works as a chronic pain physiotherapist in the NHS and also does research in the same area, based at GCU half the week. She is the branch co-convenor for Glasgow Greens and is particularly motivated by the whole system approach of the Scottish Greens to health, from universal basic income and housing to the limits of economic growth, which is needed to make significant change in Glasgow.