Henry Raymond is the penny dreadful writer who brings the Frye twins into The Dreadful Crimes, a set of murder investigations across London that he plans to turn into stories.
Raymond's amateur penny dreadfuls are based on real London murders. Investigating one in Whitechapel with Artie, he meets the twins and enlists them to solve that case and more, so he has material to write up.
The final case, the dead guard at Buckingham Palace, is Raymond's own work. He took spider venom to fake his death as the guard, watched the Queen open her safe, planted a bomb hoax to cover his escape and stole the Scepter with the Dove. He kidnaps Artie when the boy works it out, and the twins kill him on the palace roof.
In A Simple Matter of Murder! he introduces himself as a writer of cheap, lurid stories and invites the twins to try the warehouse killing. Later cases close with his own sensational retelling written for Purlock Publishing, and in The Most Hated Man in London he wonders aloud whether his brilliance will one day make him as notorious as the victim.
At Purlock Publishing the twin finds empty Prescott Munitions dynamite crates, a palace plan with the Queen's study circled, and a proof of his story about an explosion at the palace, so they rush to evacuate the investiture. No bomb goes off. In a memory palace built from the earlier cases you have to name his role and his aim; the right answers are criminal mastermind and master thief after the Scepter with the Dove.
Henry Raymond was a real alias of the criminal Adam Worth, known as the Napoleon of Crime. The character dies in 1868.
Arthur Conan Doyle
Arthur Conan Doyle appears as Artie, a schoolboy and penny dreadful fan who teams up with Henry Raymond and the Frye twins to solve the murder cases of The Dreadful Crimes.
Frederick Abberline
Frederick Abberline is the Metropolitan Police officer who works with the Frye twins in 1868 and leads the Whitechapel murder inquiry in the Jack the Ripper expansion. In the main game he gives you Bounty Hunts, sending you after Blighter leaders to bring back alive.
Queen Victoria
Queen Victoria gives the Queen Victoria London Stories, in which the twins stop a new Templar faction's bombing campaign. She also hosts the Buckingham Palace ball at the end of the main story and appears in The Dreadful Crimes and The Last Maharaja.