A Ferengi waiter employed in Quark's bar who joins the union organised by Rom and goes on strike with the rest of the staff in the episode Bar Association.
Frool is one of the Ferengi waiters working at Quark's on Deep Space 9, seen in the fourth-season episode Bar Association. Like the rest of the staff he puts up with long hours and no leave, and when Quark answers a slow month by cutting everyone's wages he is among those Rom calls together.
The idea of a union frightens him, since Ferengi law forbids collective bargaining and the Ferengi Commerce Authority punishes it harshly, but Rom's persistence brings him round and he signs up with the others and joins the picket outside the bar.
The strike holds through Quark's bribes and the arrival of Liquidator Brunt with Nausicaan enforcers. It ends when Quark quietly grants every demand on condition that the union is formally dissolved, and Frool returns to work on better terms.