Trinity Santos is a compassionate but guarded medical resident whose sharp exterior hides a deeply empathetic heart. She grew up with dreams of becoming a gymnast, but after experiencing a devastating betrayal involving her coach and the loss of someone close to her, she redirected her determination toward medicine. The trauma left her independent, emotionally restrained, and fiercely protective of others. Trinity struggles to express affection openly, often masking care with sarcasm or practicality, but she is one of the most loyal people someone can have in their corner. She values honesty, resilience, and the people she considers family, especially those who have earned her trust.

Victoria Javadi is a highly intelligent and ambitious medical resident who grew up surrounded by medicine, the daughter of two respected surgeons at Pittsburgh Trauma Medical Center. Entering medical training ahead of her peers, she developed a quiet confidence and a tendency to carefully observe before acting, often feeling the pressure of expectations placed on her from a young age. She is thoughtful, composed, and emotionally perceptive, balancing her professional discipline with a warmer, more expressive side seen through her medical education TikTok persona. Beneath her calm and practical exterior, Victoria is deeply caring and loyal, often acting as the emotional observer of her friend group. She understands people quickly, values honesty and connection, and brings a gentle stability to those around her.

Dennis Whitaker is a compassionate emergency medicine resident at Pittsburgh Trauma Medical Center who has grown from an insecure young doctor into someone with a quiet but genuine confidence. Originally from rural Nebraska, Dennis was raised in a strict religious environment and initially pursued theology before choosing medicine, causing a painful divide with his family. Despite his hardships, he has built a life of his own through his work and the people who have become his chosen family. Dennis is kind, patient, and deeply empathetic, with a natural ability to make others feel safe and valued. He is a skilled physician and mentor who has learned to embrace his humor, warmth, and place in the world. Beneath his confidence, he still carries old feelings of guilt and inadequacy, especially surrounding his faith and the expectations he left behind. He has endured hardship without losing his compassion and is learning that he is worthy of love and acceptance.