Rionoj was a female Boslic freighter captain and smuggler, and a business associate of Quark's.
In 2370, Rionoj visited Cardassia IV, where she was given Li Nalas' earring by a Cardassian who had been asked by Borum to take it to Bajor to prove that Li was alive. Rionoj later travelled to Deep Space 9, where she gave the earring to Quark. (DS9: "The Homecoming")
In 2371, Rionoj salvaged the wreckage of a Dominion ship from the Gamma Quadrant that also contained an infant Jem'Hadar. (DS9: "The Abandoned")
In late 2372, Rionoj smuggled a shipment of Falangian diamonds through Deep Space 9 and was almost apprehended by Odo. (DS9: "Broken Link")