IS-linked Australian accused of beating Yazidi girl enslaved in her home

Dozens of Australians have left the al-Roj camp in Syria in recent years. (ABC News: Baderkhan Ahmad)

The last of the known Islamic State-linked Australian women in Syria is expected to return home amid allegations a Yazidi girl was enslaved, beaten and raped in the woman's home in Syria a decade ago, the ABC can reveal.

Warning: this article includes graphic descriptions of violence that some readers may find distressing

Sydney woman Hodan Abby spent more than a decade in the self-declared Islamic State (IS) caliphate and Kurdish detention camps after leaving Australia in 2014.

When she left her home in Western Sydney it was with a friend who reportedly declared her desire to marry a jihadi fighter and become a martyr alongside him.

Ms Abby, who is of Somali descent, had been prevented from coming back to Australia under a Temporary Exclusion Order designed to delay the return of a person deemed a terrorism or security threat.

Last month, she was granted permission to return under strict conditions.

The ABC has spoken to Yazidi woman Sara, whose name has been changed, who was held as a slave in the home of a woman believed to be Hodan Abby, known to her by the nom de guerre "Umm Osama".

The Yazidis are a minority group that were targeted for extermination, mass execution and slavery by IS in 2014 in what the UN recognises as a genocide.

Yazidis have a unique culture and religion that the Islamic State caliphate aimed to exterminate. (ABC News)

Having been abducted by IS members along with thousands of other Yazidi women and children in northern Iraq in 2014, Sara was just nine or 10 years old when she was sold into the home of a foreign IS fighter she knew as "Abu Osama" in neighbouring Syria in 2016.

According to Sara, she spent the first three days in their home locked in a room without food.

When she was finally introduced to Umm Osama, her captor tried to convince his wife he'd bought the slave to help around the house, Sara said.

"After three days he told Umm Osama that he had brought me for her because she was about to give birth," Sara told the ABC.

"But his main purpose of taking me there was rape," Sara alleged.

She claimed Umm Osama initially did not realise Sara was being raped, but when she found out, she was furious.

"After she knew that, she started beating me and all my body was having bruises because of her beatings," Sara alleged.

"She beat me and also told me I wanted Osama to sleep with me."

Sara said Abu Osama then started taking her to the nearby house of his friend — another foreign IS fighter known as Abu Yahya —