| Ben | Barnes | A barista. |
| Jonah | Bendt | Violet's teenage son. |
| Aaron | Bhargava | Wendy's on-and-off boyfriend. |
| Dr. | Carlson | Wendy's doctor. |
| Mrs. | DelBanco | A Math teacher. |
| Ivy Marilyn | Eisenberg | Wendy's stillbirth child. |
| Miles | Eisenberg | Wendy's husband. |
| Wendy | Evelyn | Marilyn's eldest daughter. |
| Dr. | Fletcher | A neurologist. |
| Jennifer | Goldstein | Violet's friend. |
| Professor | Grady | Marilyn's teacher. |
| Gillian | Levin | An obstetrician. |
| Violet Rose | Lowell | One of Marilyn's daughters. Aka: Viol. |
| Ryan | Marks | Liza's live-in-partner. |
| Gretchen | Morley | The Vice President of the Parents' Association. |
| David | Sorenson | A doctor. |
| Kathryn E. | Sorenson | Liza's daughter. Aka: Kit. |
| Marilyn | Sorenson | David Sorenson's wife. Aka: Marilyn Margaret Frances Connoly. |
| Marcus | Spear | A professor. |
| Spencer | Stalling | Wendy's friend. |
| Ashton | Treslo | Violet's acquaintance. |
| Genevieve | Wilmot | Violet's acquaintance. |
| Adrian | | David's friend. |
| Alan | | A driver. |
| Autumn | | Spencer Stalling's acquaintance. |
| Caitlyn | | One of Grace's friends. |
| Candace | | Grace's acquaintance. |
| Carlton | | One of Wendy's acquaintances. |
| Carol | | Matt's receptionist. |
| Carson | | One of Wendy's acquaintances. |
| Dan | | David's acquaintance. |
| Drew | | An employee. |
| Eli | | One of Violet's sons. |
| Emily | | One of Grace's friends. |
| Evie | | Aaron's baby. |
| Goethe | | A dog. |
| Grace | | Marilyn's youngest daughter. Aka: Gracie |
| Hanna | | Jonah's foster mother. |
| Harry | | Wyatt's friend. |
| Janet | | A waitress. |
| Jax | | Wyatt's classmate. |
| Jen | | Aaron's wife. |
| Kathleen | | One of the nurses. |
| Liza Ann | | One of Marilyn's daughters. Aka: Lize. |
| Loomis | | A dog. |
| Luke | | A bartender. |
| Matt | | Violet's husband. |
| Richard | | David's father. Aka: Rich. |
| Rob | | Violet's ex-boyfriend. |
| Ruth | | Secretary of the Parents' Association. |
| Sally | | One of Marcus's cats. |
| Sharon | | One of Grace's friends. |
| Steve | | Wendy's acquaintance. |
| Terrence | | Hanna's husband. |
| Todd | | A financial analyst. |
| Walter | | One of Marcus's cats. |
| Wyatt | | One of Violet's sons. Aka: Wy. |
| Yesinia | | A housemaid. |
