Who is Nariman Hansotia from Swimming Lessons and what is their importance?

In "Auspicious Occasion," Nariman Hansotia is the retired, scholarly leader of the ad hoc tenants' association in the Firozsha Baag apartment complex. Frustrated by Rustomji's refusal to contribute to building upkeep projects, Nariman vows to make him a laughing stock and gives him the nickname "curmudgeon." Nariman daily drives his 1932 Mercedes-Benz car to the Cawasji Framji Memorial Library to read international newspapers. Hirabai is Nariman's wife and Mehroo's friend. Nariman and Rustomji appear in several stories as nemeses.