Riska is a Bajoran girl who joins Nog, Jake Sisko and Jake's friend Leanne for a double date that collapses when Nog insists on behaving like a traditional Ferengi male.
Riska appears in the third-season episode Life Support. When Jake arranges an evening with Leanne, she asks whether he can bring someone along for her friend Riska, and Jake talks a keen Nog into making up the party.
The dinner goes badly. Nog, following what he has been taught about how females should behave, expects Riska to keep quiet while the males talk and to cut up his food for him. Riska and Leanne are appalled and walk out, and Jake is furious with his friend.
The quarrel that follows is the episode's lighter subplot, setting the cultural gap between Jake and Nog against the graver story of Vedek Bareil. Odo eventually locks the two boys in a cell together so that they are forced to make peace.