Mary Tyrone: James’s wife, a fragile and morphine-addicted woman. She’s trapped in nostalgia for her lost youth and struggles with guilt over her family’s dysfunction, drifting between denial and despair.

Jamie Tyrone: The elder son, a cynical, alcoholic drifter in his 30s. He’s charming but aimless, resentful of his father’s stinginess, and carries a mix of love and blame toward his mother.

Edmund Tyrone: The younger son, a sensitive aspiring writer in his 20s, loosely based on O’Neill himself. He’s sickly (diagnosed with tuberculosis in the play) and caught between his family’s tensions and his own existential musings.

Cathleen: The family’s maid, a minor character who provides some comic relief and a glimpse of outsider perspective. She’s Irish, chatty, and a bit naive, often caught up in the family’s drama unintentionally.