The founder of GeneticAlly, known for his coffee order at Twiggs, and a key figure around whom significant elements of the story revolve, including professional and personal developments.

Jess’s 34-year-old best friend and a charismatic romance novelist who provides emotional support and companionship to Jess throughout the narrative.

Jess's affectionate and intuitive seven-year-old daughter who shares a bond over science with several other characters.

Jess's loving grandparents who have helped raise her and offer support and stability in her life.

Jess’s absentee mother whose inconsistent presence and habits have left a significant impact on Jess’s life.

Key employees at GeneticAlly involved in the company's operations, including foundational contributions to the matchmaking service DNADuo.

The first Diamond Match couple at GeneticAlly, providing foundational data for the company's matchmaking efforts.

River’s older sisters who bring warmth to the story and help shed light on his background and family dynamics.