The defender helped City to lift the Women's Super League title in 2016 along with three Women's FA Cups.
Prior to her spell in Manchester, the defender spent time in the USA during which she made her international debut for England against Norway in January 2014.
She was part of the Lionesses squad which won UEFA Women's Euro 2022, having also captained Great Britain to a gold medal in the 2013 Summer Universiade in Kazan, Russia.
Demi studied at Gateshead College and started her youth career with Sunderland, and is now back in the North East as Newcastle United Women look for a third straight promotion.