When Evie Amati allegedly carried out an axe attack at Enmore last weekend, she was "psychotic, hallucinating and delusional", according to her lawyer.
A court has heard Amati was hearing voices inside her head "telling her to kill".
Amati, who is accused of a rampage at 7-Eleven Enmore last Saturday morning, is undergoing gender transitioning.
On Thursday it was revealed she had more charges laid against her, including intent to kill.
“My client has very little or no memory of it at all,” Amati’s defence lawyer Charles Waterstreet told the court.
Mr Waterstreet said Amati’s condition was “consistent with psychosis”.
He intended to apply for Amati’s release on bail in court on Thursday.
The high-profile lawyer only found out Thursday morning that the 24-year-old was facing three new charges following the vicious attack.
Two of the charges relate to wounding with intent to murder and another for attempting the same offence against a third person, outside the 7-Eleven.
Two alleged victims, Sharon Hacker and Ben Rimmer, were treated in hospital and have both since been discharged.
A third man was unhurt in the attack.
“She had very little, if any, intention to do what happened,” Mr Waterstreet said.
“Very little culpability for what happened.”
The court heard Amati was on large doses of drugs at the time of the alleged attack, including anti-depressants, gender-transition medication and another unknown substance.
Her lawyer has asked that the punk rock drummer, who was born as Karl, be placed in a mental health facility if she’s granted bail when the case returns to court next month.
“You'll be seeing that this was a behaviour completely inconsistent with her earlier life,” Mr Waterstreet said.