Isobel Mary Christiansen is an English former footballer who played as a midfielder or forward. She is known for her time with Manchester City Women between 2014 and 2018, and Everton (2019–2023). She has also played for Birmingham City and Lyon. She played as a junior international in 2009 and later in the senior team, including in the 2019 World Cup qualifiers.

Everton Football Club is an English women's association football team based in Liverpool, England, that competes in the FA Women's Super League, the top division of English women's football. Formed in 1983 as Hoylake W.F.C., it is now part of Everton F.C. and has played home games at Walton Hall Park in Walton since February 2020. The team has won the Premier League National Division once, the Premier League Cup once, and the Women's FA Cup twice.