A woman in the episode Prophet Motive with whom Quark is negotiating a sale of self-sealing stem bolts in his quarters when Grand Nagus Zek arrives unannounced.
Emi is an alien businesswoman seen in the opening scene of the third-season episode Prophet Motive. Quark has her in his quarters on Deep Space 9, where she is massaging his ears while the two haggle over a consignment of self-sealing stem bolts that he is trying to offload at a healthy profit.
Just as she is about to agree to his price, the door opens and Grand Nagus Zek walks in with his servant Maihar'du, announcing that he is moving into Quark's rooms.
Things get worse for Quark when Zek, who has secretly been altered by the wormhole aliens, cheerfully advises Emi that she can buy the bolts wholesale elsewhere for far less and tells her where. She leaves delighted, and Quark is left with his first sign that something is badly wrong with the Nagus.