With a PhD in Chemistry from University of Bristol, Sun Walker (28) is Rosa Scott’s younger cousin – their mothers are sisters. Sun has led a less charmed life than Rosa and Martha, spending her early years on a council estate in Bristol. Her parents met at a gin festival and formed their own, successful micro-botanical gin distillery called ‘Joyful Ruin’. Like Martha, Sun has dedicated her life to finding new antibiotics but she’s coming at it from a different angle. She loves to design new molecules / antimicrobials and her forte is re-designing ones that are no longer working. Sun has a young boy called Zian (5), but the father left them just a year after he was born. Sun now shares the family home with her Dad and works at a pharmaceutical company called Dragon Diagnostics.