<Dl> <Dt> Christopher John Francis Boone </Dt> <Dd> The 15 - year - old protagonist and narrator of the novel , who investigates the murder of Mrs Shears ' large black poodle . </Dd> <Dt> Ed Boone </Dt> <Dd> Christopher 's father , a boiler engineer . Prior to the beginning of the story , he has been living with Christopher as a single parent for two years . </Dd> <Dt> Judy Boone </Dt> <Dd> Christopher 's mother . Early in the book , Christopher writes that she died of a heart attack two years before the book 's events . </Dd> <Dt> Siobhan </Dt> <Dd> Christopher 's paraprofessional and mentor at school . She teaches him how society works and how to behave within its complex guidelines . </Dd> <Dt> Roger Shears </Dt> <Dd> One of the neighbours who lived near the Boones , but who has left his wife before the story begins . </Dd> <Dt> Eileen Shears </Dt> <Dd> Mr Shears 's wife , who attempts to console Ed for a time after Christopher learns of his mother 's death . </Dd> <Dt> Mrs Alexander </Dt> <Dd> An old lady , who is one of Christopher 's neighbours , who offers information to help Christopher 's investigation regarding his parents and Mr and Mrs Shears . </Dd> <Dt> Rhodri </Dt> <Dd> Ed Boone 's employee . </Dd> <Dt> Toby </Dt> <Dd> Christopher 's pet rat . </Dd> <Dt> Wellington </Dt> <Dd> Mrs Shears ' large black poodle , which Christopher finds dead in her garden , with a garden fork sticking out of him . </Dd> </Dl>
curious incident of the dog in the nighttime character
Christopher John Francis Boone Ed Boone Judy Boone Siobhan Roger Shears Eileen Shears Mrs Alexander Rhodri Toby Wellington