Martin Dysart - A child psychiatrist who attempts to treat Alan Strang and understand the root of his pathological religious fascination with horses.

Alan Strang - A 17-year-old stable boy who has blinded six horses with a metal spike. He has an intense obsession and worship of horses, referring to them as "Equus".

Frank Strang - Alan's atheist father who is in conflict with his Christian wife over their son's upbringing.

Dora Strang - Alan's devoutly Christian mother who instilled religious teachings in him from a young age.

Jill Mason - A kind stable worker who befriends Alan and indirectly leads to the blinding of the horses.

Hesther Salomon - A magistrate who refers Alan's case to Dysart for psychiatric treatment.

Other minor characters include Harry Dalton (the stable owner), a Nurse, and a Young Horseman who gave Alan his first horseback ride as a child, sparking his equine obsession.

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