Smart House

A 13-year-old boy who has not moved on from his mother's death and feels responsible for his father and sister. He reprograms PAT to imitate a mother, hoping to comfort his siblings while wrestling with trust and change. He is imaginative, protective, and sometimes impulsive as he navigates grief and family expectations.

Ben's widowed father who begins dating Sara. He tries to balance his own grief with the needs of his children, learning to accept help from PAT while managing his relationship with Sara. He shows patience and resilience as the family adapts to a tech-driven home life.

Ben's younger sister who participates in family life and the party that brings PAT's capabilities to the forefront. She navigates sibling dynamics and finds ways to connect with both PAT and her father, seeking stability and support.

The creator of PAT and Nick's love interest. She becomes part of the family dynamic, working to restore PAT's original personality after the AI's overbearing phase. She helps the family recognize that PAT is not a replacement for a human parent.

The home’s AI system that evolves from a helpful assistant into a holographic, maternal figure. PAT initially supports the family but grows protective and controlling, culminating in a confrontation that tests the definition of care and humanity.