A precocious 18-year-old with SCID, a severe autoimmune disease that means she cannot leave the house without risking her life. Because of her illness, Maddy has grown up extremely sheltered: the only people she sees…
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Olly
Maddy’s love interest. He’s a teenager who moves into the house next door with his family. Olly wears only black clothes and is interested in parkour, a type of street gymnastics, which means that…
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Mom/Dr. Pauline Whittier
Maddy’s mom, a third-generation Japanese doctor and a single mother. Mom and Maddy have an extremely close relationship, as Mom has dedicated her entire life to caring for Maddy. After losing Maddy’s dad and…
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Carla
Maddy’s beloved nurse; Carla’s job is to spend eight hours per day monitoring Maddy’s vital signs. Carla has a 17-year-old daughter named Rosa, whom she dotes on and loves dearly. She’s been caring…
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Olly’s Dad
An abusive person both physically and verbally. To the best of Olly’s knowledge, his dad first became violent about a decade before the novel begins, after he was fired from his job in New…
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"My students can't get enough of your charts and their results have gone through the roof." -Graham S.
A good friend of Olly’s whom Olly and Maddy meet up with in Maui. Zach is gay, and wants to be a rock star, neither of which he feels he can tell his parents…
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Mr. Waterman
Maddy’s architecture tutor. He’s Maddy’s favorite tutor, the only one whom Mom has ever allowed to enter the house and tutor Maddy in person. Mr. Waterman delights in Maddy’s work and encourages her to…
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Olly’s Mom
Olly and Kara’s mom is a stay-at-home parent. She spends her days gardening and tries to convince her children to do their chores so that they don’t make Olly’s dad angry, but she nevertheless…
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Nurse Janet Pritchert
The nurse Mom hires to replace Carla. Maddy recognizes that Nurse Janet is authoritative and delights in being more of an authority and less of a friend, as Carla was. She’s a fan of…
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Minor Characters
Rosa
Carla’s 17-year-old daughter. Rosa never appears in the novel herself, but Carla mentions Rosa often and Maddy understands that Carla loves Rosa and wants her to have anything that will make her happy.
Dr. Chase
The SCID expert whom Maddy sees to confirm that she doesn’t actually have SCID. He helps her develop a plan for introducing her underdeveloped immune system to the world, though Maddy often doesn’t take his advice.
Kara
Olly’s sister. She smokes several cigarettes per day to cope with Olly’s dad’s abuse and, like the rest of her family, Maddy observes that she tiptoes around her dad but still cannot escape his wrath.
Dr. Melissa Francis
The doctor who attends to Maddy in Maui. She’s the one to identify that Maddy doesn’t actually have SCID and encourages Maddy to seek a second opinion.
Maddy’s Dad
Maddy’s father; a black man who gave Maddy her curls. He was Mom’s soul mate, but died tragically in an accident along with Maddy’s brother when Maddy was an infant.
Maddy’s Brother
Maddy’s older brother. He died in a car accident with their dad when Maddy was an infant.