For the citizen that informs you about the Hati Wolf, see Vali.
Fremennik citizens are citizens of Rellekka that can be talked to as well as thieved from. They can only be pickpocketed after completion of The Fremennik Trials, and require level 45 Thieving to do so. A successful pickpocket yields 40 coins and 65 Thieving experience. If you are caught pickpocketing a Fremennik citizen, they say a number of different things, including "You have betrayed your heritage", or "You shame us." If you are caught, they will sometimes end the sentence with your Fremennik name.