Emma is a 28-year-old travel nurse who moves frequently for work. Having experienced a highly unstable childhood in the foster system, she avoids long-term commitments and keeps all her possessions in two suitcases. She uses a metaphorical concept of an isolated island to describe how she handles stress, shutting out almost everyone when she feels overwhelmed.

Justin is a software engineer living in an apartment overlooking a plumbing billboard in Minneapolis. He recently watched his latest ex-girlfriend immediately settle down with his own roommate, cementing his belief that he is cursed in dating. Behind his dating woes, he faces a massive life change as he prepares to take full custody of his three younger siblings.

Amber Grant is Emma's chaotic and highly impulsive mother. She struggles to maintain steady employment or consistent contact with her daughter, frequently dropping in and out of Emma's life. Amber focuses heavily on securing romantic validation from wealthy men, often molding her personality to match her current partner's interests.

Maddy is a fellow travel nurse and Emma's foster sister. She acts as a grounding force, handling the logistics of their shared nomadic lifestyle while fiercely guarding Emma against further emotional harm. She is highly vocal about her dislike for Amber and frequently challenges Emma to confront her avoidance habits.

Christine is a 48-year-old former chief financial officer who now works as a housekeeper. She is awaiting a six-year prison sentence for writing fake checks. She spends her remaining free time attempting to cram in as many activities as possible with her children before she leaves.

Alex is Justin's fifteen-year-old younger brother. He maintains a positive, eager attitude that helps soothe his family during a highly stressful transition. He spends much of his time focusing on learning how to drive and trying to be helpful around the house.

Sarah is Justin's twelve-year-old sister who is going through a difficult stage of adolescence. The stress of her father's passing and her mother's impending imprisonment makes her prone to lashing out at her family. She responds positively when treated with direct understanding rather than pity.

Chelsea is Justin's four-year-old sister who is just beginning preschool. Being the youngest, she struggles to comprehend the upcoming changes in her family structure and requires significant comfort and stability from her older brother.

Neil is the wealthy owner of the island cottage where Emma stays, as well as her boss at the hospital. Known for his terrible moods at work, he shows a more generous and patient side in his personal life, going out of his way to accommodate his new tenants and romantic interest.

Brad is Justin's best friend and former roommate. He recently moved into an apartment with Faith, who is Justin's ex-girlfriend. Despite this potentially awkward dynamic, Brad remains highly supportive of Justin and eager to help him prepare for his new family responsibilities.

Faith is Justin's most recent ex-girlfriend. She quickly found love with his best friend, Brad, perfectly illustrating the strange dating curse Justin believes he suffers from.

Benny is one of Justin's close friends. He is in a serious relationship and frequently tries to include Justin in group trips. He generously offers his time and resources to help Justin renovate his home for his younger siblings.

Leigh is Christine's best friend and Brad's mother. She is a fiercely loyal companion, helping Christine through her final days before heading to prison. She occasionally requires help from others due to being banned from popular rideshare apps.

Daniel is a resident of Wakan, Minnesota, who connects with Emma online. He was raised by his grandparents and has built a stable, grounded life with his own family in his hometown.

Janet is one of Maddy's mothers who opened her home to foster Emma when she was fourteen. She provides a stable, loving environment, paying for education and offering a permanent home base for the traveling nurses.

Beth is Maddy's other mother and Emma's foster parent. Along with Janet, she attempts to provide Emma with the secure, loving family dynamic she lacked in early childhood, supporting her through high school and college.

Maria is Neil's housekeeper who manages his large mansion. She frequently finds herself annoyed by Amber's chaotic infiltration of the home and alerts others when situations get out of hand.

Jane is Benny's partner. She fosters kittens and provides a comfortable, low-pressure environment for Justin's elaborate first date with Emma.

Briana is an emergency medicine physician and Benny's sister. She agrees to make a house call to the isolated island when Emma falls severely ill.

Jacob is Briana's husband. He assists her during a medical house call to the island, helping administer fluids to Emma.

Alexis is Daniel's wife. She lives with him in Wakan and provides a welcoming presence when they host visitors.

Doug is Daniel's best friend who lives in Wakan. He becomes part of the wider social circle when Maddy and Emma relocate for work.