Finn’s best friend who, despite different economic backgrounds, remains a supportive and capable figure, demonstrating intelligence and bravery in pivotal situations.

The matriarch of the Miller family and a lawyer, who embodies stoicism and resilience, displaying exceptional communication skills that hold her family together through challenging times.

Finn’s father, characterized by his outdoor enthusiasm, optimism, and emotional openness, who strives to mend familial discord through thoughtful gestures.

The eldest daughter of the Miller family, who represents hope and continuity through her actions and future-oriented perspective, acting as a catalyst for familial healing.

The middle daughter, sharing Finn’s vibrant hair color, best known for her aloofness yet deep care for her family, especially her sister Finn.

The youngest sibling at 13, who possesses a developmental disability but demonstrates a kind heart and loyalty, particularly toward his dog, Bingo.

A relative figure to the Miller siblings who faces moral dilemmas, unveiling limitations in crisis response and ethical decision-making during critical incidents.

Ann's best friend and almost like an aunt to Finn, who maintains a meticulously organized lifestyle yet undergoes profound personal changes following the accident's aftermath.

Bob and Karen’s only child, initially competitive with Finn and Mo, whose experiences during the accident prompt significant personal development.