Thomas is an 18th-century English poet who attends Eton College and later Cambridge University. The only surviving child in his family, he finds solace in close male friendships and academic pursuits. He develops a formal yet deeply emotional poetic style, drawing heavily upon his own memories and observations of youth.

Richard is a young student at Eton College who forms a deep bond with Thomas Gray. He is part of a close-knit clique known as the "Quadruple Alliance" and frequently exchanges poetry with his friends.

Horace is the son of English politician Robert Walpole and a student at Eton College. He joins the "Quadruple Alliance" and shares a passion for art and literature, eventually planning a European tour with Thomas.

The Speaker of the poem is an adult observing the grounds of Eton College from a distance. Burdened by the pains of adulthood, the speaker finds temporary relief in watching the schoolboys play, reflecting on the blissful ignorance of youth.

Philip is an exchange broker and clerk living in London. He possesses a cruel and violent temper, creating a volatile home environment that causes his wife to leave him temporarily to ensure her own safety.

Dorothy operates a successful millinery business in London. She is a resilient mother who endures domestic hardship but prioritizes her son's well-being, eventually sending Thomas to Eton College to prepare for Cambridge.

Thomas Ashton is a student at Eton College. Alongside Gray, West, and Walpole, he completes the "Quadruple Alliance," a group of quiet, artistic boys who support each other through their academic years.

Charles is a 24-year-old Swiss aristocrat who deeply admires English poetry. He travels to Cambridge where he spends significant time studying literature alongside Thomas Gray.

Father Thames is the personification of the river that flows past Eton College and London. The speaker addresses the river as an ancient, silent witness to the generations of energetic children playing along its green margins.