Natalie is Emily's older sister. Her wisdom and love has guided Emily throughout her entire life.

Abigail is Emily's younger sister. They were inseparable as children and still have a special connection as adults.

Lydia is Emily's cousin but might as well be a sister. They went from playing as kids to being college roommates.

Nat is one of Emily's best friends from college. They have such a sweet friendship despite appearing to be complete opposites.

Dr. June and Emily were roommates in medical school. They are trauma-bonded and lifetime karaoke partners.

Katie is one of Emily's best friends from college. Katie knows how to ground Emily while also making her laugh.

Sam is Baker's younger brother. It is hard to tell that he is younger, as he is a foot taller than Baker. Most of Baker's favorite childhood memories were made with Sam by his side.

Liam is one of Baker's best friends from high school. Their shared love of sci-fi and racing provide the basis of most conversations.

Kenny is one of Baker's first friends from Purdue. They bonded over difficult math classes and a shared love for aircraft.

Aidan started as a friend-of-a-friend for Baker but they quickly became close. Aidan's go-getter attitude led to fitness challenges with Baker that still continue today.

Ani was Baker's neighbor at his first doom room at Purdue. His strong sense of humor and determined mindset helped Baker through many tough courses.