Shamima Begum, now 19 and pregnant, told the Times she had no regrets but wanted to have her baby in the UK.
She said she had moved to the camp two weeks ago from the eastern Syrian town of Baghuz, ISIS's final stronghold, where her one-year-old daughter and three-month-old son died from illness and malnutrition.
Begum and Abase were both 15, while Sultana, another Bangladeshi-British, was 16.
After arriving in Raqqa in 2015, the trio of schoolgirls stayed at a house with other IS brides-to-be, Ms Begum told The Times.
However, on Thursday morning, Wallace warned that while Begum had a right to return to her country, "anyone who goes out to fight or support organisations such as [IS]. should expect to be interviewed, and should at the very least expect to be prosecuted".
Ten days later she married a 27-year-old Dutch man who had converted to Islam - and has been with him since then.
As the terrorist organization lost more and more ground against the various forces in Syria, the teen and her family moved down along the Euphrates river valley, finally ending up in the last bit of territory the group still controls, Baghouz.
Despite the oppression and violence witnessed, Begum said she didn't regret leaving.
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She told The Times that life with IS alternated between the everyday and extreme horrors, but insisted witnessing shocking sights did not affect her: "Mostly it was a normal life in Raqqa, every now and then bombing and stuff". "But other than that..." "It didn't faze me at all".
Stating that she was not fazed by seeing a severed head in a bin for the first time, she said: "It was from a captured fighter seized on the battlefield, an enemy of Islam".
"I know what everyone at home thinks of me as I have read all that was written about me online", she said.
"I don't regret coming here".
However, Ms Begum's family have begged for her to be welcomed back to the UK.
"I don't have high hopes".
Asked whether living in the one-time IS stronghold of Raqqa had lived up to her aspirations, Ms Begum said: "Yes, it did".
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She added: "I never thought it would happen". "It just came out of nowhere, it was so hard". She vanished with two other teenage girls from the Bethnal Green area of east London.
She told the paper that "the caliphate is over". "There were no drugs available, and not enough medical staff", she said.
Akunjee said: "There were deep failings by the police which led to the children going to a war zone".
"I was weak", she said.
"In the end, I just could not endure any more", she said of her desire to get out.
Despite having "no regrets" she now wants to return to the United Kingdom after her husband was killed and two children died.
"I'm scared that this baby's going to get sick in this camp". She has put all that radicalisation behind her and just wants to live a normal life now.
He said: "I can understand why people in this country are angry and don't want her back. There are consular services elsewhere in the region and the strong message this government has given for many years is that actions have consequences".
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