Offshore empire of Putin's friend shines light on Kremlim wealth A virtuoso concert cellist who calls President Vladimir Putin a "brother", Sergei Roldugin has flown under the radar while other close friends of the Russian leader openly amassed vast fortunes. But now the "Panama Papers" leaks have put the godfather to Putin's eldest daughter at the head of an offshore empire worth more than $2 billion and sparked fresh speculation on the Russian leader's personal wealth. IMAGES of Bank Rossiya, which the US Treasury identified in March 2014 as a "personal bank" for the Kremlin elite, and of the Saint-Petersburg House of Music where Roldugin is director