Mumbai-based Mrs. Demellow’s grandchild is part of a band. “My relationship with Mr. Tata gave me an insight into how rich inter generational relationship is,” says 30-year-old Naidu, who works as a general manager in the office of Ratan Naval Tata, Chairman Emeritus of Tata Sons. Through this service she met Mr. Dutta, whom she fondly calls “daadu.” Together, they …