Miss Caroline Louise Endres was born in Great Barrington, Berkshire, Massachusetts on 14 June 1872.
Known as Carrie, she was the daughter of German immigrants, Otto Endres (b. 1836), a tailor, and Louisa Raifstanger (b. 1851) who had married in Great Barrington on 30 March 1871. She had one known sibling, her brother Frank (b. 19 March 1874).
She appears on the 1880 census living in Great Barrington with her family. Her mother later died on 19 June 1881 and her father was remarried in 1883 to her aunt Mina "Minnie" J. Raifstanger (b. 1850). Her father died in 1904 and her aunt/stepmother Minnie in 1932. They are both buried in Mahaiwe Cemetery, Great Barrington.
A graduate of St Luke's Hospital School of Nursing, New York, Miss Endres was employed as the private nurse to Mrs Madeleine Astor who, travelling in Europe for her honeymoon, was pregnant. She boarded the Titanic at Cherbourg as a first class passenger and occupied cabin C45. She travelled on the Astor's ticket (17754).
Details of Caroline's life after the Titanic disaster are sketchy but it is known that she was never married. By 1918 she was living out of Pennsylvania and spent time living in Bala Cynwyd in that state and continued her nursing career, making several more trips across the Atlantic in years to come. When she arrived in Plymouth on 11 June 1923 aboard the President Adams of the United States Line she was described as a secretary.
By the time of the 1940 census she was a lodger at an address in Binghamton, Broome, New York and it seems she spent the rest of her life in that city, later living in a retirement home there.
Caroline Endres died in Binghamton on 11 January 1964 aged 91 and she was buried in Maple Hill Cemetery, Hanover, Pennsylvania.