Così

• Lewis: The director of the production and main character. He is Lucy's boyfriend but later has an affair with Julie, one of the mental patients.
• Roy: A manic-depressive with a passion for theatre, especially the play Cosi. He is often annoyed with Lewis' directing as he finds it lacklustre.
• Cherry: A large woman with a food obsession and is a Lewis-addicted romantic.
• Ruth: A woman suffering from obsessive–compulsive disorder (OCD) and is shown as obsessed with counting and distinguishing between illusions and reality
• Doug: A pyromaniac, who often makes innuendo. He was admitted into the psych hospital after setting his mother's cats one fire, which later burned down her house.
• Julie: A drug addict who has a dependency on junk. She kisses Lewis, making his fidelity come into question.
• Henry: An older, silent man who previously a lawyer. His despises communists as his dad was a soldier in the Korean War.
• Zac: A drugged-up pianist who despises Mozart and favours Wagner.
• Lucy: Lewis' girlfriend who has an affair with Nick.
• Nick: Lewis' best friend and a political left-wing extremist.
• Justin: A social worker at the mental institution.

Così was performed at La Boite Theatre in February, 2003.^[3] The play debuted in Asia in 2009, performed in The Hong Kong Fringe Club and directed by Wendy Herbert. It received its UK premiere in 1999 at the New End Theatre in London, starring Isla Fisher in her only stage appearance to date. It was performed at the White Bear Theatre in Kennington, London, starring Australian actor Mark Little as the manic-depressive Roy and Matthew Burton as the young theatre director, Lewis; it was directed by Adam Spreadbury-Maher for a 4-week season in August 2008.^[4] In 2011, the play was performed at the King's Head Theatre in Islington, London, directed by Adam Spreadbury-Maher.^[5] In 2012, the play was performed at Urban Stages in New York City, directed by Jesse Michael Mothershed and produced by Australian Made Entertainment.^[6][7] In February 2014, the play was given a major Australian revival by La Boite Theatre Company directed by longtime Louis Nowra collaborator David Berthold. Melbourne based theatre company MTC revived it again in a production directed by Sarah Goodes in May 2019.^[8]