Arthur Birling: Capitalist businessman
Sybil Birling: Upper-class, socially prominent wife
Sheila Birling: Impressionable, socially-aware younger generation, feminist movement
Eric Birling: Impressionable, socially-aware younger generation, toxic masculinity
Gerald Croft: Privilege, dominance of upper classes and patriarchy
Inspector Goole: Socialism, social responsibility, ideal justice system
Eva Smith: Neglected lower-classes