She is the former political secretary to Democratic Action Party (DAP) veteran leader and Member of Parliament Lim Kit Siang.

In January 2012, Dyana joined Democratic Action Party and she was subsequently elected into DAP Perak Youth Wing's executive committee.

Following the vacancy of Telok Intan parliamentary seat due to the death of its member of parliament, Seah Leong Peng, Dyana was nominated as the DAP candidate for the 2014 Telok Intan by-election where her victory would have allowed her to become the first ever female Malay Member of Parliament for the DAP.

[14] Dyana is married to Zairil Khir Johari, a Malaysian politician and current Penang State Executive Councillor.

Later in the year, Dyana was selected by the Australian Department of Foreign Affairs and Trade to participate in the Australia-Malaysia Muslim Exchange Programme.