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Agathus
Agathus was an elderly, Jewish door slave to Titus's palace. During The Assassins of Rome, he befriended Jonathan ben Mordecai and his uncle, Simeon ben Jonah. When Jonathan was captured and enslaved, Agathus was kind towards him and helped him deal with the pain of the branding. It is apparent that he was either an ex-freedom fighter or an ex-assassin, as he takes Simeon's sica as some form of password. He despises the Romans, and it is implied that he was there at the Sack of Jerusalem.
He appeared once more in The Enemies of Jupiter, where it became clear that he was the agent of potential assassin, Berenice, who was determined to kill Susannah bat Jonah, sister to Simeon and mother to Jonathan. Agathus led Jonathan into believing that his mission was to kill Titus, although Jonathan eventually guessed his true plan: to burn down Rome. They engaged in a fatal battle, in which Agathus, despite being armed with a knife, was knocked into the flames by the terrified boy and perished.
Agathus has appeared in the following novels:
- The Assassins of Rome
- The Enemies of Jupiter
Alma
Alma is the loyal house-slave of the Geminus household. Plump and jolly, she is a firm believer in tradition and is very protective of Flavia, often taking the role of her mother-figure.
She is a stereotypical house-wife figure: a knowledgeable cook, cleaner and knows of everything going on in Ostia, due to her gossiping ways, a valuable asset to Flavia and her friends. She is rarely seen without her male counterpart, Caudex, with whom she frequently gossips with, although it is apparent that she believes him to be rather slow. She was hit by the fever in December AD 79.
Alma made several appearances in these following novels (which normally start off in Ostia):
- The Thieves of Ostia
- The Dolphins of Laurentum
- The Twelve Tasks of Flavia Gemina
- The Enemies of Jupiter
- The Colossus of Rhodes
- The Charioteer of Delphi
- The Slave-girl from Jerusalem
- Trimalchio's Feast and other mini-mysteries
Argos
Flaccus' dog. Mentioned in the last book: The Man from Pomegranate Street. Flaccus names his dog, "Argos" as Flavia's dog is named "Scuto".
Aristo
Aristo, son of Diogenes, is a young Greek from Corinth who has been Flavia's tutor for several years, and comes to act as tutor for the other children. He appears in most of the books. He is both intelligent and handsome. He teaches them philosophy, Greek language and music. He plays the lyre and often accompanies Nubia when she plays the flute. He is very helpful to the detectives, being flexible about what constitutes education.
He is hopelessly in love with Miriam and after her death in childbirth he is distraught and is noted to play very sad music. He apparently fails to notice that Nubia loves him.
In The Fugitive from Corinth his family background is revealed. He has a brother, Dion, who has always been envious of his seemingly perfect brother and tries to murder him but injuring Marcus instead. In the final book, "The Man from Pomegranate Street", he confesses his love for Nubia and marries her.
Ascletario
Ascletario is an astrologer in the service of Titus. In The Enemies of Jupiter he acts as the children's guide to Rome, describing and explaining the history and customs of the city. He talks incessantly and has some odd mannerisms which the Jonathan mocks behind his back. He then appears in The man from Pomegranate Street.
Atticus
Atticus is an elderly Greek sailor serving aboard The Delphina, under Marcus Geminus.
Atticus made his first appearance in The Colossus of Rhodes, where it was discovered that he is unable to read or write. He serves mainly as Ship's Cook, and on many occasions his food is described as being sublime. He is one of the few crewmembers who was not suspected by Flavia and her friends, as the culprit would have to be literate. Atticus also assists the captain, Marcus Artorius Bato, and Gaius Valerius Flaccus in subduing the traitor, Zosimus.
During The Fugitive from Corinth, Atticus takes a more major role, serving as the detectives' guide. He has a good head for the geography of his native country and it is revealed that he has a girlfriend named Flora, after whom he named his dagger.
His skills as a cook are mentioned at a higher extent as well as his talent at hunting, causing Jonathan and he to become firm friends. When not pulled back with a sling, Atticus' grey hair is scary, causing a tired Jonathan to believe that he is Medusa. Atticus has appeared in numerous times as a background character.
Atticus has appeared in the following novels in the series:
- The Colossus of Rhodes
- The Fugitive from Corinth
- The Sirens of Surrentum
Aulus Cornix
Aulus Caesilius Cornix, a Roman senator, is the husband of Cynthia, sister to Marcus Geminus' deceased wife, Myrtilla, and thus Flavia's uncle. He had a number of children: twelve-year-old Aulus Jr, eight-year-old Hyacinth, six-year-old twins, Quintus and Sextus, five-year-old Rhoda and two unnamed babies.
He and his family had been feuding with the Gemini family for many years when Flavia came to him in need of help for rescuing Jonathan. Although he and the family were away on holiday, his loyal secretary, Sisyphus, assisted the children.
Upon his return, he was healed from the fever by Mordecai, but lost two of his younger children. He announced the feud over between the two respective families, and has received the children as guests on numerous occasions.
Despite certain bouts of pompousness, sexism and arrogance, he really does care about his family. He is a staunch supporter of the Greens chariot racing team, and despises the Blues, in a fashion similar to his son, Aulus Jr.
Aulus Cornix has appeared in the following novels in the series:
- The Enemies of Jupiter
- The Gladiators from Capua
- The Charioteer of Delphi
Aulus Jr
Aulus Cornix Junior is Flavia's cousin. Pompous and arrogant and very much like his father, twelve-year-old Aulus Jr. is the oldest child of the Cornix family. He is a nemesis of Flavia's and can be a bully towards his siblings as well as the detectives, especially Nubia. Snobbish but reasonably intelligent, he is a firm supporter of the Greens.
Aulus Cornix Junior has appeared in the following novels:
- The Enemies of Jupiter
- The Gladiators from Capua
- The Charioteer of Delphi
Read more about this topic: List Of The Roman Mysteries Characters