This topic might have a better name.
Talk about it here.
Danielle was the sister of Jules Renan. She lived with him in July 1794. She helped take care of Ian Chesterton, Barbara Wright and Susan Foreman when they stayed at Jules' house.
She later informed Jules that a physician wouldn't come to the house to look at Susan. She then arranged for a carriage to take Susan and Barbara to the physician. (TV: The Reign of Terror)