The coupling valiancer of Hina and Bizon are completely different mecha with Fortuna and Nebiros, they are not coupling variant of both, Please Check the official website of Buddy Complex they already updated with both valiancers,  Hina's coupling valiancer is named Karura while Bizon's coupling valiancer is named Nergal

Info for Hina on her page is wrong shows 'Viktor Ryazan (Husband)' which isnt correct, right? And i also believe that Hina not to be dead correct me if im wrong.