Guy was elected to
Lisburn and Castlereagh City Council in
2019, representing the
Castlereagh South District. During her term, she served as Deputy Mayor in 2022. At the
2024 general election, she contested the
Strangford constituency, where she finished second against
Jim Shannon of the
Democratic Unionist Party (DUP), receiving 10,428 votes (26.8%).
Member of the Northern Ireland Assembly However, following
Sorcha Eastwood's election as
Lagan Valley's MP, Guy applied for the now-vacant MLA seat in the Lagan Valley constituency. On July 10, the party announced her as the new MLA. Guy's first attendance to the chamber was in supporting the Opposition to Racism motion following far-right rioting in Belfast in August 2024. In her capacity as the Alliance's education spokesperson, Guy voiced concerns regarding the
Education Minister's decision to allocate £250,000 for magnetic lockable phone pouches in schools in September 2024. She welcomed the guidance on
mobile phone use but criticised the expenditure amid financial constraints in the education sector, stating, "I find it difficult to believe this is the most appropriate use of the department's limited budget." As a member of the Education Committee, Guy raised her concerns about a controversial meeting between the Education Minister and the
Loyalist Communities Council (LCC) in September 2024. She expressed her concern about the legitimacy of the LCC as a stakeholder in educational discussions, remarking, "It was disturbing to see it... not credible for the Minister to be standing against paramilitary exploitation of children then meeting with LCC." == Personal life ==