A brilliant but absent-minded doctor whose unconventional approach to medicine often clashes with societal norms. He mentors Nora, including her in his work despite legal and social challenges.

A young doctor initially adhering to Victorian social conventions, who gradually embraces a more progressive mindset. He moves into Croft's household and becomes acquainted with Nora.

Croft’s practical and devoted housekeeper who helped persuade him to take Nora in. She is known for her candid and nurturing nature.

Daniel’s best friend and a supportive colleague who appreciates Croft's innovative methods. He develops a friendship with and admiration for Nora.

A conservative and traditional doctor who represents societal resistance to change. He opposes Croft's progressive ideas and serves as an antagonist.

An Italian character who plays a pivotal role by offering Nora an opportunity to study abroad, recognizing her talents and potential.