Mrs Sybil Birling is Arthur Birling's wife and right from the opening of the play she is cold-hearted and snobbish despite being a prominent member of local women's charity. Throughout dinner she tells Sheila and Eric off for things that she considers impolite whilst ignorantly turning a blind eye to her son drinking too much. It is clear that despite Eric being old enough to drink and Sheila getting married, she sees them both as children, not as a young man and woman.