# The Mystery of the Blue Train — Character guide

> Key figures in The Mystery of the Blue Train by Agatha Christie.

- [Hercule Poirot](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/hercule_poirot.md): The brilliant Belgian detective hired to solve the murder on the Blue Train.
- [Katherine Grey](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/katherine_grey.md): A sensible young woman who becomes a key witness and friend to Poirot.
- [Ruth Kettering](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/ruth_kettering.md): The murdered heiress and daughter of Rufus Van Aldin, traveling on the Blue Train.
- [Derek Kettering](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/derek_kettering.md): Ruth's estranged husband, a charming but reckless man under suspicion.
- [Rufus Van Aldin](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/rufus_van_aldin.md): A wealthy American financier and Ruth's devoted father, seeking justice.
- [Mirelle](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/mirelle.md): A fiery Russian dancer and Derek Kettering's mistress, with secrets to hide.
- [Major Knighton](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/major_knighton.md): Van Aldin's loyal and capable secretary, assisting in the investigation.
- [Comte de la Roche](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/comte_de_la_roche.md): A suave French aristocrat and suspected jewel thief involved with Ruth.
- [Lady Tamplin](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/lady_tamplin.md): A socialite friend of Katherine's, hosting a villa in Nice.
- [Lenox Tamplin](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/lenox_tamplin.md): Lady Tamplin's sharp-witted daughter, who befriends Katherine.
- [Ada Mason](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/ada_mason.md): Ruth Kettering's maid, who gives crucial testimony about the murder.
- [M. Papopolous](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/m_papopolous.md): An antique dealer and fence for stolen jewels, aiding Poirot.
- [Miss Viner](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/miss_viner.md): Katherine's elderly employer in St. Mary Mead, who dies early in the story.
- [M. Carrège](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/m_carrege.md): The examining magistrate in charge of the murder investigation.
- [Zia](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/zia.md): Papopolous's daughter, assisting her father in the jewel trade.
- [Chubby Evans](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/chubby_evans.md): A friend of Derek Kettering, involved in the social circle.
- [Goby](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/goby.md): A discreet private investigator employed by Van Aldin.
- [Hipolyte Flavelle](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/hipolyte_flavelle.md): A young man connected to the Comte de la Roche's circle.
- [Joseph Aarons](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/joseph_aarons.md): A theatrical agent who provides information to Poirot.
- [M. Caux](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/m_caux.md): A police officer assisting in the investigation in France.
- [George](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/george.md): Poirot's valet, who occasionally assists his master.
- [Olga Demiroff](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/olga_demiroff.md): Mirelle's maid, who provides background on her mistress.
- [Mrs. Samuel Harfield](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/mrs_samuel_harfield.md): A friend of Miss Viner in St. Mary Mead.
- [Marie Flavelle](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/marie_flavelle.md): A young woman connected to the Comte de la Roche.
- [M. Krassnine](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/m_krassnine.md): A Russian gentleman who appears briefly in the story.
- [Lord Leconbury](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/lord_leconbury.md): A friend of Derek Kettering's family, mentioned in conversation.
- [Rosalie Tamplin](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/rosalie_tamplin.md): A younger relative of Lady Tamplin, staying at the villa.
- [Mrs. Harrison](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/mrs_harrison.md): A neighbor in St. Mary Mead, mentioned in passing.
- [Kitty Kidd](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/kitty_kidd.md): A friend of Katherine Grey from St. Mary Mead.
- [Jane Harfield](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/jane_harfield.md): A local woman in St. Mary Mead, mentioned in a letter.
- [Boris Ivanovitch](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/boris_ivanovitch.md): A Russian associate of Mirelle, briefly mentioned.
- [Antonio Pirezzio](https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters/antonio_pirezzio.md): A waiter on the Blue Train, questioned by Poirot.

HTML index: https://www.betterreads.online/discover/the_mystery_of_the_blue_train_se/characters