A retired doctor in the year 2000 who becomes a guide and mentor to Julian West. He explains the workings of the new society and embodies the rational ideals of the 20th century.

The daughter of Dr. Leete, who provides emotional support to Julian West in his new environment. She shares a connection to West's past and helps him adjust to the future.

Dr. Leete’s wife and Edith Leete’s mother, who has a peripheral role in the narrative. Her existence highlights the persisting gender roles within the utopian society.

Julian West’s 19th-century fiancée, who comes from the same social class and shares his initial worldview. Her reactions reflect the mindset of their time.

Julian West's African American servant in 1887, the only character of color mentioned in the novel. His presence underscores the racial dynamics of both the past and future societies.

A mesmerist from 1887 employed by Julian West to aid with his insomnia through hypnosis, representative of the period's fascination with pseudoscientific practices.

A preacher in the year 2000 who delivers sermons via telephone wire, highlighting the technological and social changes in the future society. His character reveals the religious undercurrents of the time.