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 maintenance worker who had been convinced by the Bajoran prisoner Borum into sending it to Bajor. She promised to deliver the earring to the planet, where someone would understand its importance; however, she could not make it to the planet, so she gave the earring to Quark on Deep Space 9. (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")