The Sharma family
Most of the dialogues are based on the various members of the Sharma family, who live in Agra: Geeta (a doctor) and her husband Raju (a teacher), their children Manoj, Ram and Meena - and a dog, Moti. Because we're dealing with a set of known characters, it's easy to see the different levels of formality that are an important feature of Hindi: for example, we hear the children being addressed less formally than adults and strangers. One or two subsidiary characters,such as Pratap (a student visiting England), also appear in the book Teach Yourself Hindi, which gives a more detailed introduction to the language.