Susan's capable and dependable older sister, Greta serves as a protective mentor. Her past experiences and ruthless loyalty to her family drive her actions throughout the story.

Susan’s husband, Jon, is introduced as an easygoing and charming partner. However, his secretive actions reveal a deceitful and selfish nature that contributes to the novel's tension.

The primary antagonist, Venetia is a grieving sister consumed by a quest for vengeance. Her actions are driven by a desire for justice after a personal tragedy.

A secondary antagonist focused on maintaining her family's pristine public image, Celeste is forced to confront her own issues following Susan's viral message.

A popular teenager whose social standing is damaged by Susan’s message, Nika's actions illustrate the complex dynamics of teenage social hierarchies.

A gentle and tragic figure, Felipe is caught in the central conflicts of the novel. His actions are motivated by guilt and a desire for redemption.

A quiet and sensitive teenager, Maeve becomes a victim of cyberbullying and violence, highlighting the extreme consequences of digital transgressions.

A glamorous and wealthy woman whose life intersects with Susan's through a series of misunderstandings, Savannah becomes a pivotal figure in the unfolding drama.