ReportBuilder for Delphi 2009 is Unicode based. (ReportBuilder for Delphi 2007 and prior is Ansi string based).
Delphi 2009 introduces full Unicode support – the IDE, RTL and VCL are all Unicode based. A new UnicodeString datatype has been introduced and String now maps to UnicodeString (rather than AnsiString as it does in Delphi 2007 and prior.) ReportBuilder for Delphi 2009 embraces and leverages the Unicode RTL and VCL.