A former Australian student accused of murdering her friend with a cyanide-laced coffee is "narcissistic" and failed to show any concern when she collapsed from the poisoned drink, a court has heard.

In a trial that has been televised live in Indonesia since it began in June, Jessica Kumala Wongso, 27, is accused of killing her friend Wayan Mirna Salihin, also 27, with whom she studied design in Sydney.

Psychologist Dr Antonia Ratih Andjayani said on Monday that she had interviewed Wongso soon after her arrest in January and had also watched CCTV footage from inside the Jakarta cafe where the accused allegedly mixed the cyanide into Mirna's iced-coffee.

"She's narcissistic with a huge impulse to be the centre of attention," Dr Andjayani told Jakarta's Central District Court.

Describing Wongso as "smart", Dr Andjayani said when she was in a situation where she could anticipate what was coming next she was "calm" but when something unexpected occurred "her emotion ignited".

If the conversation turned to her relationships with friends and family, Dr Andjayani said Wongso's responses were "shallow".

Prosecutors allege Wongso murdered her friend in revenge, after Mirna expressed her disapproval of Wongso's boyfriend in Australia.

No details have been revealed in court about Wongso's boyfriend as yet, but prosecutors allege when Wongso broke it off she murdered Mirna to "avenge her pain".

On January 6, Wongso arrived at Olivier Restaurant in the Grand Indonesia mall well before Mirna and their other friend - Boon Juwita (known as Hani)- and ordered Mirna's favourite drink, an iced Vietnamese coffee.

Footage shows her re-arranging bags around the drink before eventually clearing the table.

It was during this time prosecutors allege Wongso added the cyanide to the coffee.

A few minutes after drinking it, Mirna collapsed and foamed at the mouth.

Dr Andjayani said the only person who looked panicked was Hani.

"Even when Wongso went to get water it's not in a hurry ... No matter how helpless she was, no matter how confused she was, there has to be a gesture of helping. That's not shown from Jessica."

The Australian Federal Police (AFP) have provided information in the case after it was given assurances by the Indonesian government that were Wongso convicted, the death sentence would not be sought or carried out.

This has raised the ire of Mirna's father Edi Dermawan Salihin who says if she is convicted, based on evidence gathered by local police, the agreement should be void.

The trial continues.