Clare is Nora's former best friend from grade school, known for her charming yet manipulative demeanor. She commands attention effortlessly and is central to the unfolding events and the group's complex dynamics.

Nina is a sarcastic yet compassionate doctor and Nora's enduring friend from school. She strives to support Nora through difficult moments and holds a clear dislike for Clare due to past grievances.

Flo is Clare's devoted maid of honor who looks up to her to an unhealthy extent. Exacting in her desires for a perfect celebration, she is intensely loyal yet vulnerable to manipulation.

Tom is a playwright and the only male at the party, who often uses humor to cope with tense situations. He is married and associated with both Clare and James through his work and social circles.

Melanie is a new mother who struggles with being away from her baby for the first time during the hen party. Her practical concerns lead her to reveal personal insights about Clare and Flo to the others.

Detective Lamarr is the lead investigator charged with solving James's murder, characterized by her professionalism and considerate treatment of Nora. She balances careful inquiry with approachable empathy.