She attended Collège Charles-Lemoyne before finishing her high school at the Ontario Hockey Academy.

[4][5] After graduating, she moved to Sweden to sign her first professional contract with newly-promoted Göteborg HC in the Swedish Women's Hockey League (Swedish: Svenska damhockeyligan, SDHL), and was named an assistant captain for the club.

She added another 5 points in 2 relegation playoff games as the club was able to keep their spot in the top flight.

[8] She scored 7 points in 26 games in her debut Canadian Women's Hockey League (CWHL) season.

Bannon represented Canada at the 2013 IIHF World Women's U18 Championship, scoring one goal in five games as the country won gold.