One of Boris Berezovsky's children paid tribute to her father on Wednesday following his death in Britain at the weekend, saying he was not a "typical parent" but she was proud of him.
The 67-year-old Russian oligarch and Kremlin critic was found dead on the floor of his bathroom in his mansion in the upmarket town of Ascot, west of London, on Saturday afternoon.
A post-mortem found he had been hanged and police have said they do not believe anyone else was involved in his death.
In the first public response from his family, issued ahead of the opening of the inquest on Thursday, his daughter Anastasia Berezovskaya paid tribute to an "extraordinary" man.
"My father was not the typical parent, nothing about him was ordinary," she said in a statement issued on behalf of her mother, Berezovsky's second wife Galina Besharova, and her brother.
"He has coloured my life in infinite ways, and I know that what he concerned himself most with was making all his children proud."
Besharova divorced Berezovsky in 2011 in what is considered Britain's costliest settlement.
Friends have said Berezovsky became deeply depressed after losing a costly court case against rival oligarch Roman Abramovich last year and may have taken his own life.
However, Russian media questioned the suggestion of suicide, amid conspiracy theories ranging from assassination to a fake death.
Berezovsky spent the first half of his career as an academic before seizing opportunities when the Soviet Union opened up and reinventing himself as a billionaire businessman.
But his fortunes declined with the election of Vladimir Putin as president in 2000, when he fled to Britain claiming political asylum and became one of the Kremlin's fiercest critics.
Anastasia said of her father: "He has taught me to never stop fighting for what one believes in no matter what the costs may be."
Berezovsky had six children; two with his first wife Nina, two with Galina Besharova and two with his partner Elena Gorbunova.
Although the inquest into Berezovsky's death opens on Thursday, police are still awaiting the results of toxicology tests which could take several weeks.