On the stage, she has played the role of Renee in David Henry Hwang's M Butterfly at the Singapore Repertory Theatre and Miss Julie in the August Strindberg play Miss Julie at the Tristian Bates Theatre.
In 2013, she established Two Shillings and Six Pence Productions which is a company of actors who meet weekly perform quarterly and raise money for a local charity.
Giles wrote, produced and acted as Shelly Long in the play The Two Faces of Agent Lacey, directed by Simon Fellows and staged at The Arts in the ' Above The Arts' space.[2][3]
In 2015, she appeared as Claire Macneill in the play Bluebird by Simon Stephens at the Tabard Theatre.[4] In 2016, she appeared as Lisa in the play Wastwater by Simon Stephens at the Tabard Theatre. In 2017, she appeared as Heather in the play The Wasp by Morgan Lloyd Malcom at The Jermyn Street Theatre.