| | | | Part 1 - The
Inspectors |
| 1 | Jacob | | Boy who saved Cassidy's life / Cassidy's ghost best friend. |
| | Mr. | Meyer | Cassidy Blake's teacher. |
| | Matt | | Cassidy Blake's classmate. |
| | Derek | | Cassidy Blake's classmate sleeping in class. |
| | Will | | Cassidy Blake's
classmate who was sleeping in class. |
| | Alice | | Cassidy Blake's popular classmate. |
| | Melanie | | Cassidy Blake's popular classmate. |
| | Cassidy | Blake | Protagonist / A girl with a ghost best friend. aka: Cass. |
| 4 | | | Skull and Bone - Jacob's favorite comic book. |
| | Skull | Shooter | The dead cowboy. |
| | Grim | | Cassidy Blake's cat. |
| | Mr. | Blake | Cassidy Blake's father. aka: Dad. |
| | Mrs. | Blake | Cassidy Blake's mother. aka: Mom. |
| | Dino | | A restaurant owner. |
| | | |
Edinburgh, Scotland - The City of Ghosts. |
| | | | Part 2 - The City of Ghosts |
| 6 | Cabbie | | A taxi driver who has a ghost story. |
| 7 | | | The Lane's End where Cassidy and family stayed in Edinburgh. |
| | Mrs. | Weathershire | A woman who ran "The Lane's End" . |
| | Mr. Reginald | Weathershire | Dead husband of Mrs. Weathershire / A ghost. aka: Reggie. |
| | Mr. | Weathershire | Mrs. Weathershire's son. |
| 8 | | | Arthur's Seat - The Giant Hill |
| | | | Greyfriars Kirk - Haunted
home in EU. |
| | Bobby | | The Greyfriars' most famous tenants. / A famous ghost. |
| 9 | Lara Jayne | Chowdhury | Someone
Cassidy met at "The End's Lane" / Reginald's niece. |
| 10 | The | Raven in Red | The woman in the Red Cloak / Antagonist. |
| 11 | Findley | Stewart | Blake's Family tour guide / Mr. Reginald Weathershire's friend. |
| | | | Part 3 - Ghost Hunters |
| 18 | Alice | | Lara Chowdhury's aunt. |
