Who is Jaakaylee from Swimming Lessons and what is their importance?

Jaakaylee is the narrator and protagonist of "The Ghost of Firozsha Baag," Jaakaylee (Jacqueline as mispronounced by the Parsis) is a 63-year-old, slightly overweight ayah originally from Goa, who has worked 49 years for the Karani family in B Block of Firozsha Baag. She is an observant Catholic who has always believed in ghosts and becomes a laughing stock when she reports seeing one in Bombay.