Claire Trevena was first elected to the Legislative Assembly in the 2005 election and re-elected in the 2009 election. She was the critic on transportation and BC Ferries and, in that role, produced a report comparing the BC Ferries system with the Washington State Ferries system and introduced the Provincial Shipbuilding Act in both 2014 and 2015 seeking to have future ferries constructed in Canada.
Originally from England, Trevena has a background in journalism having worked as a Canadian correspondent for British media. After she immigrated, she worked for the Canadian Broadcasting Corporation and then as a public information officer for the Organization for Security and Co-operation in Europe. After moving to British Columbia with her husband, she started her own business specializing communication strategies. She unsuccessfully filed a complaint with the British Columbia Human Rights Tribunal after being fired from a job because of her political affiliation. She was an advocate of renovations to the hospitals in Campbell River and Comox, opposing the health authority's plans to replace them with a new regional hospital near Courtenay. She endorsed John Horgan in both the 2011 and 2014 leadership elections.