Rowan was born in Cornwall to a Scottish father and Welsh mother and raised primarily in South Wales. She is fluent in English & Welsh having completed her education through the medium of the Welsh language. She studied drama in Ysgol Glantaf in Cardiff and in South Glamorgan Youth Theatre with Theatr Iolo, followed by workshops. She won Best Supporting Actress at the 'It's My Shout' awards in November 2016. She is extensively traveled, including on cargo ships as a child with her merchant-navy father.