Jeni Haynes is about 30 minutes into reading her victim impact statement. This is the woman who developed multiple personality disorder after years of sexual abuse by her father in Sydney between the ages of four and 11.

Her voice softens, she crosses her hands in front of her. This is four-year-old Symphony the first of her 'alter' characters. She will use about 30 alters during the delivery, dipping in and out of each personality throughout.

Incest victim Jeni Haynes arrives at the Downing Centre Court on Friday. Credit:Steven Siewert

Crown prosecutor Sean Hughes asks: "Is this Symphony now?" Ms Haynes confirms it is.

The childish voice continues: "Dad’s abuse was extreme, violent, sadistic, unescapable, unavoidable, constant and life threatening, not to mention overwhelming. As a result of this my mind created a new personality to deal with dad.