According to the index on the Scotland's People web site, Charlotte Kepper, 18, is in the parish of Gamrie in 1861. On FreeCEN and FindMyPast she is indexed as Charlotte Repper, and she is a housemaid, born Macduff, in the household of William Dockar, farmer, at Gellyhill. You need to look at the original document and see whether you think it says Kepper or Repper.
In 1851 she is enumerated as the daughter of William Raeper, labourer, at 61 Gellymill Street.
Charlotte Repper, daughter of William Repper and Margaret Fletcher, was baptised in Gamrie on 6 March 1841. (Macduff is in the parish of Gamrie.)
William Reaper and Margaret Fletcher had
William, baptised 31 January 1829 in Fordyce
Anne, baptised 27 February 1831 in Alvah
Robert Thomson, baptised 1 September 1833 in Alvah
Janet, baptised 19 March 1837 in Alvah
Margaret, baptised 30 June 1839 in Alvah
Charlote, baptised 6 March 1841 in Gamrie
Margaret Fletcher, 67, died in Banff in 1867, mother's maiden surname Thompson. If she was William Reaper's wife, she ought to be indexed under her married surname as well as her own - you need to look at the certificate to see what it says.
William Roper, son of George Roper and Ann Man, was baptised in Grange on 6 September 1807.
It looks as if Charlotte married William Ord in 1865 in Alvah. They were in Alvah in 1881 and 1891.