Lady Bracknell is the epitome of the Victorian age - she behaves like a lady, and believes that proper behavior is the most important thing a person can express in public. She is against anything she may consider vulgar, and despises people who do not belong in her class. She is very private, and believes that good upstanding is what everybody should strive to. These are all qualities of the Victorian era, when everybody seemed a little uptight.
I thinks it’s A cause stock character is in literature and theater or film of a type quickly recognized and accepted by the reader or viewer and requiring no development by the writer