This lists all recurring characters who have their own page. See Characters By Episode for a comprehensive list of all named characters sorted by First Mention/Appearance.
| Name | First Episode | Description | |
|---|---|---|---|
| Arthur Lester | Part 1: The Dark World | Recently-blinded private investigator | |
| John Doe (The Entity) | Part 1: The Dark World | Mysterious voice guiding Arthur | |
| Peter "Parker" Yang | Part 1: The Dark World | Arthur's best friend and business partner | |
| Eddie | Part 1: The Dark World | Maintenance man for Arthur's Office | |
| Roland Cummings | Part 1: The Dark World | Retired private investigator, father of Amanda | |
| Emily MacFarland | Part 1: The Dark World | Victim of cult-related violence | |
| Shub-Niggurath | Part 1: The Dark World | Monstrous entity with a cult following | |
| Armitage | Part 2: The Missing Girl | Librarian at Miskatonic University Library | |
| Amanda "Sarah" Cummings | Part 2: The Missing Girl | Daughter of Roland, victim of cult-related violence | |
| Anna Stanczyk | Part 3: The Mansion | Friend of Amanda Cummings, possible survivor of cult-related violence | |
| Kellin Holeman | Part 4: The Voices | Truck driver, notably wears a gas mask | |
| Lilly | Part 5: The Gift | Kindly nurse at Harper's Hill hospital | |
| Faroe | Part 6: The Hill | Arthur's daughter, after whom a song is named | |
| Antoine | Part 8: The Caves | Previous lighthouse keeper, alleged cult leader | |
| Henry MacFarland | Part 8: The Caves | Father of Emily, died trying to stop Antoine's cult | |
| The King In Yellow | Part 8: The Caves | Monstrous, opportunistic entity with a cult following | |
| The Vanguard | Part 10: The Hotel | Sentinel-like entity possessing a severed head | |
| Dr. Jeffrey Orrett | Part 12: The End | Physician at Arkham Psychiatric Hospital | |
| The Trader | Part 13: The Dreamlands | Bargaining-driven creature found roaming the Dreamlands | |
| Frank Underhill | Part 14: The Desert | Friend of Henry, trapped within the Dreamlands | |
| Tess | Part 15: The Storm | Hired caretaker for Faroe | |
| Bella | Part 16: The Path | Arthur's late wife, and Faroe's mother | |
| Daniel Saltzman | Part 18: The Madness | Father of Bella and grandfather of Faroe | |
| Michael Faust | Part 19: The Prison | Prisoner forced to share a pit with Arthur | |
| Lorick | Part 19: The Prison | Being known as a Cana, rescued from the prison pits | |
| Kayne | Part 20: The King | Self-professed Malevolent entity, genial but blood-soaked | |
| Yellow | Part 21: The Unconquerable | Less-mysterious voice guiding Arthur | |
| Jack "Uncle" Larson | Part 21: The Unconquerable | Ram-like creature, member of the Larson family | |
| Wallace "Andrew" Larson | Part 23: The Past | Head of the Larson family, cultist of The Order of the Fallen Star | |
| Addison Larson | Part 23: The Past | Deceased daughter and sacrificial victim of Wallace | |
| The Butcher (Dennis Collins) | Prelude | Killer for hire | |
| Marie | Part 30: The Tenant | Widow and landlady whose family is connected with Mr. Scratch | |
| Mr. Scratch | Part 31: The Nightmare | Nightmare entity haunting people's dream and possessing their body | |
| Oscar | Part 32: The Tenant | Clergyman and friend of Marie | |
| Detective Noel | Part 35: The Deal | Detective and former prisoner of The King In Yellow | |
| Yorick | Part 42: The Prince | The vanguard, now given a mouth and a new name | |
| Lilith | Part 51: The Purpose | Daughter of Kayne, was Mr. Scratch. Arthur is her favorite. | |
| The Manager | Da Capo | Manager of The Waylay |
