Shiva is Marion’s twin brother, born shortly after him. He is a mirror image of Marion physically but is intense, withdrawn, and insensitive to others' feelings. He is a dedicated doctor specializing in treating fistulas and is passionate about dance.

Genet is the daughter of Marion and Shiva's nanny, raised alongside them. She is rebellious and becomes a love interest for Marion. Her actions, including associating with political turmoil, serve as catalysts for significant changes in Marion's life.

Thomas Stone is the birth father of Marion and Shiva, a brilliant British surgeon focused on medicine. He experiences a crisis after his knowledge fails him and eventually becomes an absentee father but makes medical advancements that play a crucial role in the story.

Ghosh is the adoptive father of Marion and Shiva, an internal medicine specialist who also becomes a surgeon. He is Marion’s mentor, known for his optimism and kindness, and encourages Marion to pursue his passion for medicine.

Hema is the obstetrician and gynecologist at Missing Hospital, originally from Madras, India. She raises Marion and Shiva and is a mentor to Shiva. Hema is strong, intelligent, and independent but can be judgmental and unforgiving.