Mary Jane Kelly was approximately 25 years old at the time of her death which would place her birth around 1863. She was 5' 7" tall and stout. She had blonde hair, blue eyes and a fair complexion. "Said to have been possessed of considerable personal attractions." (McNaughten)
She was last seen wearing a linsey frock and a red shawl pulled around her shoulders. She was bare headed. Detective Constable Walter Dew claimed to know Kelly well by sight and says that she was attractive and paraded around, usually in the company of two or three friends. He says she always wore a spotlessly clean white apron.
Maria Harvey, a friend, says that she was "much superior to that of most persons in her position in life."
It is also said that she spoke fluent Welsh.
Joseph Barnett says that he "always found her of sober habits."
Landlord John McCarthy says "When in liquor she was very noisy; otherwise she was a very quiet woman."
Caroline Maxwell says that she "was not a notorious character."
Catherine Pickett claims "She was a good, quiet, pleasant girl, and was well liked by all of us."