A 36-year-old head of the cardiology department at Denver General who struggles with his Alpha designation and societal perceptions, marked by his meticulous work ethic and introverted demeanor.

A senior cardiologist driven by resentment towards Noah for receiving the head of department position, known for his falsely pleasant demeanor and underhanded behavior.

Mackenzie’s best friend and IT tech at Denver General, known for his skepticism about Noah and his loyal support of Mackenzie.

A registered nurse and one of Mackenzie’s first work friends who harbors romantic feelings for her, characterized by his guidance and later rivalry with Noah.

Mackenzie’s grandmother who acts as both a maternal figure and matchmaker, deeply involved in Mackenzie’s personal life and healing process.

A concerned parent who frequently checks in on Noah through her vast network, worried about his isolation and lack of familial interaction.

A retired cardiologist and Noah’s former mentor, who remains one of Noah’s few confidants and trusted advisors.

An on-call anesthesiologist at Denver General with a penchant for gossip, known for her sharp observations and curiosity about Mackenzie’s personal life.