Featuring minor characters appeared in the series ‘The Alienist’, whose limited screentime or relevance do not provide enough material to grant an individual page.
Flora is a prostitute regularly visited by John Schuyler Moore.
She's a character portrayed by Emanuela Postacchini.
New York City, 1896. Flora wore an engagement ring, sitting at the dressing table of her boudoir and teasing her companion, a handsome man sitting on the edge of the bed. Above a succinct petticoat, she wore an elegant dress and her long, curly hair was decorated with a crescent moon-shaped tiara. While the man undressed her, she continued to play the part of the grumpy and treacherous fiancee. In a short time, the two erotically embraced but they were soon interrupted by the brothel's maîtresse. The plump middle-aged woman said that a lad urgently asked for John Schuyler Moore and helped the client getting dressed while talking to Flora in French. In the meantime, Flora washed her nether parts in a basin near the bed. Before John left, he left a coin on Flora's hand while the young prostitute returned the ring to him.
A few days later, John visited Flora again and the two they made the same roleplay again, clearly re-evoking an event from John's past. 
After barbarously stabbing a friend of his named Edwin Band in a fight, the police officers believed that he, blinded by bloodlust, had also killed Giorgio Santorelli, "the Boy on the Bridge." Dr. Kreizler asked if anyone else had questioned Wolff, besides the police, but Dr. Fuller replied that someone had tried but Wolff almost ripped his eyes out.
He was repeatedly banging his forehead against the corner of the cell, causing himself deep wounds while Dr. Laszlo Kreizler and John Moore came visiting him. Ignoring the cries of the other inmates, Dr. Kreizler asked Mr. Wolff what he hoped to achieve through similar "exercises." When Wolff approached the bars, revealing a face horribly disfigured by sores, the alienist replied that there was no cure for the advanced stage of syphilis. Dr. Kreizler investigated the reasons that led Wolff to kill his friend, Edwin, inquiring him to kill the boy too. Addressing the Paresis Hall, however, Wolff snorted, stating that he was not accustomed to "molly houses full of rich pansies." Following Wolff's sexual allusions to John Moore, Dr. Kreizler asked Mr. Wolff if Moore reminded him of his friend Edwin, triggering a crisis in the suspect, who shouted he would kill him again if he could. The alienist continued his inquiry, ordering the guard to open the cell to approach Henry Wolff, despite John's advise not to do it. Once there, he was able to make the suspect confess he had nothing to do with the murder of Giorgio Santorelli since Edwin Band's murder was a crime of passion. Upon leaving, Wolff asked Kreizler what will catch him first between the gallows or the pox, to which the alienist replied he was afraid that in the New York State it would be the electric chair. "Either way, his pain will be gone soon." 
He's a character portrayed by Jefferson White.
Giorgio Santorelli was a young twelve-year-old Italian immigrant hired at the Paresis Hall, where he used to wear women's clothes and went by the name of Gloria.
He is a character portrayed by Nicolo Borgatti.
Mrs. Santorelli is a poor Italian immigrant. She doesn’t speak English but her oldest son helps translate what she is saying when Sarah Howard and John Moore arrive at her overcrowded slum apartment to investigate Giorgio’s murder. She tells them Giorgio acted different from her other sons and that’s why he ran away. It is implied that Giorgio’s father beat him harshly because of his effeminate nature. She went to Sarah at the police station after the murderer sent her a disturbing letter.Her oldest son tries to talk her out of it since the police have been so callous and brutal about hushing the case up. Kreizler deducts that the killer gets sexually aroused witnessing the pain and anguish of others and that he watched her take the letter to the police station because her cries and anxiety excited him. 
Enzo is the oldest Santorelli child. He lives in a dirty, crowded slum with his parents, siblings, and other relatives. He speaks English almost as well as Italian and translates conversations for his mother. He is practical about Giorgio’s death. He understands the police beat his father because they are trying to hush the case up. Enzo tried to dissuade his mother from taking the new evidence to the police station because “they don’t care.” 
Benjamin and Sofia ZweigEdit
Mayor Lafayette StrongEdit
Ali ibn-Ghazi was a Syrian immigrant sold to Scotch Ann due to gambling debts. Forced to prostitution, he assumed the name of Fatima.
Mrs. Moore is John Schuyler Moore's grandmother, who welcomed her grandson into her own house after he became estranged from his father. Following the breakup of the engagement between John and Julia, Mrs. Moore tries to arrange a new engagement for her grandson, in the hope of having great-grandchildren. 
Mr. Van BergenEdit
Mrs. Van BergenEdit
Joseph is a young prostitute who gave an important clue to John Moore in his pursuit of the killer.
He's a character portrayed by Jackson Gann.
Joseph is referred to as “Bernadette” when with clients. The child appears to be about 12 or 13. Bernadette is in the employee of brothel owner Scotch Anne. Bernadette speaks and dresses as a female but uses a male voice and name after Detective Sergeant Isaacson shows her a police badge. Joseph tells Marcus and John how Ali identified as “Fatima” and went with “a Saint” who said he’d take her to a castle in the sky. John is kind to Joseph, wiping the makeup off with a handkerchief and warning Joseph not to go with the “man with the silver smile” because he killed Fatima. John then gave Joseph a calling card asking him to contact him immediately if he sees the “man with the silver smile.” 
Scotch Ann, a pimp based in the Tenderloin, is a character portrayed by Kate Dickie.
“Scotch” is period jargon that would be “Scottish” in today’s terminology. In fact, Ann speaks with a Scottish accent. She is the owner and proprietor of “the Golden Rule,” a basement brothel employing young men who present themselves as females. She expresses annoyance and frustration that the murder of “Fatima” causes her brothel to be shut down. She explains to John Moore and Detective Sergeant Marcus Isaacson that she “bought” Ali Ibn-Gazi, a Syrian immigrant child, “fair and square” from his father to pay off a gambling debt. 
Mrs. Williams is a former patient of Dr. Laszlo Kreizler who suffers from unspecified mental issues that push her to sadistic behavior towards those whom both Kreizler and herself have described as "hapless." Mrs. Williams has found a way to perform her impulses through the role of dominatrix during sexual role-playing games. 
She's a character portrayed by Katherine Kingsley.