Natwarlal Prabhatshankar Undhaiwala

Natwarlal Prabhatshankar Undhaiwala, mostly known as Nattu Kaka, is the manager of Jethalal's electronics shop, Gada Electronics. Nattu Kaka is fluent in English and effectively handles the operations of the shop. He often irritates Jetahalal by using sophisticated words despite knowing Jethalal's incompetency with English. He is from a village Undhai. He resides in Mumbai with his nephew Bagha as his wife does not live with them. Nattu Kaka and Bagha take their dinner at Padmavati Bhojanalay. He disturbs Jethalal with his perplexing offers and peculiar schemes. For several years Nattu Kaka is demanding salary hike but Jethalal cunningly turns down his request each time. However, Nattu Kaka is very honest, intelligent, and efficient with his work. His wife's name is Mangoo (Episode 488).

Behind the scenes
The role is essayed by Ghanashyam Nayak.