| Pro | Kaveri | Murthy | A mathematician and lady detective. |
| | Rama | Murthy | Kaveri's husband. A doctor. |
| 1 | Mrs. | Reddy | A wife of another doctor. |
| | Lalita | Iyengar | Mr. and Mrs. Lyengar's daughter. |
| | Poornima | Reddy | Mrs. Reddy's daughter. |
| | Ramappa | | One of Kaveri's companions. |
| | Mrs. | Iyengar | Lalita's mother. |
| 2 | Rajamma | | The Murthy's maid. |
| | Manju | Gowda | The Murthy's milkman. |
| | Gauri | | The Murthy's cow. |
| | Venu | | Manju's younger brother. |
| | Bhargavi | Murthy | Kaveri's mother-in-law. |
| 3 | Dr. | Appia | Ramu's colleague. |
| | Muniamma | | Manju's wife. The Roberts's maid. |
| 4 | Charles | Roberts | Chief Medical Superintendent of Bangalore. |
| | Daphne | Roberts | Charles's wife. |
| | Kantaraj | Urs | One of the Century Club's founding members. |
| 6 | Mr. | Ismail | Detective Inspector of Wilson Garden Police. |
| | Ponnuswamy | | Murdered. Manju's friend. |
| 9 | Mala | | Manju's lover. |
| 11 | Kamala | Miss | Kaveri's math teacher. |
| 12 | Thimakka | | A hospital attendant. |
| 13 | Bhagavantam | Sastry | One of the doctors. |
| | Indira | Sastry | Mr. Sastry's wife. |
| | Uma | | Kaveri's old companion. |
| 14 | Seshadri | Iyer | Former Dewan of Mysore. |
| | A.G | Allen | The assistant surgeon. |
| 16 | Hiramma | | Venu's grandmother. |
| | Kala | Gowda | Ramu's non-vegetarian friend. |
| 17 | Narsamma | | Mala's companion. |
| 19 | Ambujakshi | | Kaveri's old classmate. |
| 23 | John | Cameron | The park superintendent. |
| 28 | Mr. | X | The man who wrote to police. |
| 29 | Mrs. | Green | The store owner. |
| 33 | Krishna | | Indira's son. |