Harding was a Human man.
In 2370, Harding attended a poker tournament that was held by Quark on Deep Space 9. Harding asked Quark if Klar, a friend of his, could also join the tournament. When Naralak was murdered during the tournament and Nam was stabbed, Klar was revealed to be L'sthwan, who was sought on many worlds for similar crimes. Harding himself was wanted for an assault that he committed on Sifts IV. (DS9 novel: The Big Game)