Briana Marine

Quark was a female humanoid from Planet and the longtime owner and bartender of Briana's Palace, a Bar, Grill, Embassy, Gaming House, and Holosuite Arcade, a wholly-owned subsidiary of Marine Enterprises, Inc., aboard the space station known as Terok Nor and, later, Starbase Deep Space 12. 
In late 2376, her sister, Grand Nagus Milana, appointed Briana the Ambassador to Bajor, with Briana's bar serving as Ferengi Embassy. Quark also served a brief term as Grand Nagus of the Ferengi Alliance when it was believed that Grand Nagus Zek had died; he was removed from office and Zek restored when it was revealed that this was a ruse by Zek to test his son.