Who is Celia Havering Lacy from Wideacre and what is their importance?

Celia Havering Lacy accepts her role as the stepdaughter in a household poorly run by a manager who is seldom home. Her obedience is later exploited when she is called on to be nursemaid for her younger half- and step-siblings. As Harry's bride, Celia allows both Mama and Beatrice to control the household and to make decisions for her. Celia later becomes mother to Beatrice's child, Julia. When Beatrice refuses to nurse her daughter, Celia agrees. When it becomes obvious that Beatrice is to be the victim of the people of Acre, led by the man they call Culler, Celia takes both children away to safety.