Rionoj is a Boslic freighter captain and occasional business contact of Quark, who brings Li Nalas's earring to Deep Space 9 and later sells Quark the wreckage containing a Jem'Hadar infant.
The Boslic captain, played by Leslie Bevis, appears three times in Deep Space Nine. Her name, Rionoj, comes from the scripts and is not spoken on screen. She runs a freighter and deals in goods of uncertain origin, which makes her a natural associate of Quark.
In The Homecoming she hands Quark a Bajoran earring that she was asked to deliver while on Cardassia IV. It proves to belong to the resistance hero Li Nalas and sets off Kira's rescue mission. In The Abandoned (2371) she sells Quark a load of salvage from the Gamma Quadrant, among which he finds an infant who grows rapidly into a Jem'Hadar.
She makes a final appearance in Broken Link, again in Quark's company. She is the most prominent member of the Boslic species seen in the franchise.