The Importance of Being Ernest

John (Jack/Ernest) Worthing, J.P. - The play’s protagonist. Jack Worthing is a seemingly responsible and respectable young man who leads a double life. In Hertfordshire, where he has a country estate, Jack is known as Jack. In London he is known as Ernest. As a baby, Jack was discovered in a handbag in the cloakroom of Victoria Station by an old man who adopted him and subsequently made Jack guardian to his granddaughter, Cecily Cardew. Jack is in love with his friend Algernon’s cousin, Gwendolen Fairfax. The initials after his name indicate that he is a Justice of the Peace.
Jack Worthing (In-Depth Analysis)

Algernon Moncrieff - The play’s secondary hero. Algernon is a charming, idle, decorative bachelor, nephew of Lady Bracknell, cousin of Gwendolen Fairfax, and best friend of Jack Worthing, whom he has known for years as Ernest. Algernon is brilliant, witty, selfish, amoral, and given to making delightful paradoxical and epigrammatic pronouncements. He has invented a fictional friend, “Bunbury,” an invalid whose frequent sudden relapses allow Algernon to wriggle out of unpleasant or dull social obligations.
Algernon Moncrieff (In-Depth Analysis)

Gwendolen Fairfax - Algernon’s cousin and Lady Bracknell’s daughter. Gwendolen is in love with Jack, whom she knows as Ernest. A model and arbiter of high fashion and society, Gwendolen speaks with unassailable authority on matters of taste and morality. She is sophisticated, intellectual, cosmopolitan, and utterly pretentious. Gwendolen is fixated on the name Ernest and says she will not marry a man without that name.
Gwendolen Fairfax (In-Depth Analysis)