To her friends and neighbours she was bubbly and outgoing, if a bit "clueless". But on Wednesday morning Hasna Aitboulahcen, 26, became Europe's first woman suicide bomber as police stormed the flat where she was holed up with two fellow Islamic State terrorists.One of the two men killed in the siege was thought to be her cousin Abdelhamid Abaaoud, the mastermind of Friday's attacks in Paris which left 132 dead.Aitboulahcen had appeared at a window to the flat shortly after 6am, as police special forces accompanied by soldiers moved in.She was later heard screaming "help me, help me!", moments before detonating a suicide vest packed full of explosives as armed French anti-terror police stormed the flat. It is suspected her plea was made with the intent of luring police closer. The explosion was so violent that her spine was later found in the street outside.People who knew Aitboulahcen described her as an "extrovert" who drank alcohol and said she was nicknamed "the cowgirl" for her habit of wearing cowboy hats.But on her Facebook page she can be seen wearing a niqab and brandishing firearms. She tried to travel to Syria to aid Islamic State, but never managed to. She then "offered her services to commit terrorist attacks in France", according to police sources.At one stage she was the director of a building firm called Beko Construction, set up in 2011 at Épinay-sur-Seine. The firm, which police are understood to be investigating for possible links to money-laundering and terror funding, went into liquidation last year. ..