Lady Cynthia Eden-Jones was a psychic and ally of Professor Trevor Bruttenholm.
Lady Cynthia was formerly a famous clairvoyant in service to the British Paranormal Society.
Lady Cynthia Eden-Jones appeared alongside Professor Trevor Bruttenholm, Malcolm Frost, and U.S. military official George Whitman during the "Hellboy incident". She was present when a small demon suddenly appeared, claiming it looked like "a little boy". Unaware that he was about to name the creature, Bruttenholm then followed up on this, by saying "Hell boy".
By 1953, she was working under the Special Intelligence Directorate. When one of her agents went rogue, she contacted Professor Bruttenholm to ask the B.P.R.D. to assist under the ruse that she wished to acquire a artifact in Hong Kong.
This was not their last encounter. In 1961, Hellboy met her again shortly before she died.