Joanna Palani, 23, is currently behind bars and facing trial in Copenhagen for leaving the country after a 12-month travel ban imposed in June 2015, The Independent reported.
Her trial begins tomorrow and if found guilty she faces up to two years in prison under the new laws designed to stem the flow of ISIS militants from Denmark to the Middle East.
Palani is often the subject of vicious threats both on and offline following her return to Denmark.
"How can I pose a threat to Denmark and other countries by being a soldier in an official army that Denmark trains and supports directly in the fight against [ISIS]?" she posted on Facebook shortly after her passport was confiscated by cops last year.
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Palani, whose family originate from Iranian Kurdistan, was born in a refugee camp in Ramadi in Iraq during the first Gulf War. Her family won asylum in Denmark when she was a child.
In a Facebook post, Palani said she was inspired "to fight for women's rights, for democracy - for the European values I learned as a Danish girl.