I did a Google search on our forum member and this is what came up.
Harry Hole, a police officer with the Oslo Crime Squad, lost his mother, a descendant of the Sami people, to cancer while he was in his twenties, and he has never had a close relationship to his father, Olav Hole, a former teacher. Now in his early forties, Harry has a younger sister with Downs syndrome. He is unmarried, but has had close relationships with a number of women throughout the series of ten novels. Otherwise, he has few close friends – and the seeming ability to make enemies from amongst some of his colleagues who, nevertheless, grudgingly respect him.
Hole is a heavy smoker and an alcoholic although, at times, his alcoholism is under control. The effects of his problem sometimes bring him into repeated conflict with his superiors and some colleagues, but Bjarne Møller, head of Hole's department and one of his closest friends, manages to prevent him from being sacked as a result, primarily because he recognises that Harry Hole is a brilliant detective who is recognised amongst his colleagues because of his role in the solving the case of a serial killer in Australia. Hole is one of few in the force who has undergone special training in police interrogation techniques and firearms by the FBI.
So that's who OneHarryHole really is.