I got an issue with an UTF-8 character (ASCII code : 9658, a black right-pointing pointer).
I use Jaspersoft Studio 6.3.1 for my test, and a XML data adapter.
If I use any output format but pdf, the character is printed as expected (I check java, HTML, docX)
If I use pdf output, the character is not printed.
If I use docX ouput, and then I use Word to save my document as PDF, the character is printed.
You'll find my jrxml file and XML join to the issue.