Jordan is a public relations executive who immigrated from Colombia as a child. He co-owns a PR firm with his husband, Jordy. Having reached the five-year mark of remission for prostate cancer, he learns his illness is terminal. Though he identifies as an atheist after a Catholic upbringing, he relies heavily on dark humor and his close-knit group of friends to confront his mortality.

Jordy is a practical, solution-oriented former collegiate swimmer who runs a PR firm alongside his husband, Jordan. Standing 6'4" and remaining fiercely loyal, much of his identity is tied to his marriage. He struggles with the emotional weight of his husband's illness, often focusing on management rather than emotional comfort to cope with the impending loss.

Naomi is a successful music industry professional known for her sarcastic wit and brutal honesty. Raised by wealthy Japanese parents who were frequently absent and highly critical, she internalized a sense of never being enough. She masks her vulnerability and difficulty expressing emotion behind a cynical exterior and an independent lifestyle.

Craig is an art authenticator and collector who struggles to form lasting romantic connections, often engaging in superficial relationships. Having been given up by his parents early in life, he depends heavily on his college friends for emotional support. He faces a deep personal and professional crisis involving his work in the art world.

Marielle is a caring, community-minded vegetarian who often puts others before herself. She feels lost after dedicating years to being a wife and mother, realizing her personal identity has been completely subsumed by her caregiving roles. In the wake of her divorce, she seeks to reclaim her independence and rediscover who she is outside of her family obligations.

Alec is the missing member of the friend group, whose tragic death from a drug overdose during their senior year at Berkeley forever altered his friends' lives. The youngest of six siblings, he was impulsive, openly used drugs, and possessed a fragile beauty that his friends idolized. His memory serves as a constant reminder of youth and mortality for the remaining group.

Mia is Marielle's daughter, who leaves to attend college in Massachusetts. She acts as a grounding force for her mother and represents the passage of time for the friend group. She maintains a slightly detached but affectionate attitude toward the adults in her life.

Max is Marielle's former husband. They met in Washington, D.C., shortly after she graduated from college. He eventually asked for a divorce when their daughter was nearly seventeen, prompting Marielle's crisis of identity.

Gary is Naomi's fiancé. Though he does not attend the group's Big Sur gathering, his presence in Naomi's life indicates her desire to build a stable and loving future. He shares inside jokes with her, such as the significance of her jade ring.