Visual novel
Sōtetsu Migita (右田 双鉄, Migita Sōtetsu)
Voiced by: Ei Mochizuki (credited as Ki Kashino in visual novels)
Adopted son of a family of brewers. Was the victim of a railway accident of which he was the only survivor in his family. Sōtetsu later acts as Hibiki's secretary after she assumes her position as mayor. His maiden name is Sogō.
Hachiroku (ハチロク, Hachiroku)
Voiced by: Atsumi Tanezaki (credited as Hana Kiritani in visual novels)
Raillord accidentally awoken by Sōtetsu, having been stowed away in a display case for a long time. Speaks in a very refined and formal tone. She personifies the JGR Class 8620 2-6-0 Mogul-type steam locomotive, specifically, number 8620, the lead member of her class. In one of the sub-endings, Sōtetsu confesses to Hachiroku; despite her initial reservations they agree to get married, with Hachiroku given the married name of Suzu Migita (右田 铃, Migita Suzu).
Hachiroku also appears in the anime, but is unvoiced.
Hibiki Migita (右田 日々姫, Migita Hibiki)
Voiced by: Maki Tomonaga (credited as Himari in visual novels)
Stepsister of Sōtetsu who is also an aspiring artist. Noted as being very optimistic. Her speech often slips into a Kumamoto drawl; she will then attempt to correct it back into a more refined tone which she uses "as she is now older". She subsequently becomes the mayor of Ohitoyo. In the future, she becomes a locomotive designer.
Paulette Hinai (雛衣・ポーレット, Hinai Pōretto)
Voiced by: Kei Maeda (credited as Sanma Aji in visual novels)
Mayor of Ohitoyo and operator and caretaker of Reina. Noted as being very timid and is of Franc descent. Due to a harassment incident at a city council meeting involving an outside heckler, Paulette resigns as mayor of Ohitoyo due to the pressure; she then acts as a mentor for Hibiki after the latter takes up her position. In the official canon of the story, Sōtetsu and Paulette marry; she later gives birth to a daughter named Hikari.
Reina (れいな, Reina)
Voiced by: Mai Kadowaki (credited as Mitsu Anzu in visual novels)
Raillord always noted as being in the company of Paulette. She is the personification of the JNR KiHa 07 series (ja) diesel railcar. Speaks extremely slowly and in a fashion similar to that of a toddler. Reina also appears in the anime, but is unvoiced.
Makura Migita (右田 真闇, Migita Makura)
Voiced by: Kei Mizusawa (credited as Rino Kawashima in visual novels)
Sōtetsu's adoptive older sister and the owner of the Migitachi Brewery. Speaks with a heavy Kumamoto drawl, has a very shapely figure and has a very sisterly personality.
Kisaki Hōshō (宝生 稀咲, Hōshō Kisaki)
Voiced by: Akane Sanada (credited as Akane Ueda in visual novels)
Daughter of the owner of the Kumamoto Bank as well as a branch manager for the Ohitoyo branch. Noted as being the first to discover Hibiki's talent and is regarded as a "reliable senpai". Is very shrewd and astute. Once Hibiki assumes her position as mayor, Kisaki acts as one of her assistants; in one of the sub-endings, Sōtetsu confesses to Kisaki and they agree to get married.
Nagi Minokasa (蓑笠 凪, Minokasa Nagi)
Voiced by: Yotsuba Yagami (credited as Yayoi Hayase in visual novels)
An young tomboyish girl of who is very interested in swordplay. Acts as the poster girl for the Minakasa blacksmith shop. In the future, she becomes the assistant to a railway engineer.
Fukami Hayase (早瀬 ふかみ, Hayase Fukami)
Voiced by: Mai Nagai (credited as Emi Sakura in visual novels)
An young girl of similar age to Nagi who manages the Kuma River Rafts. Is an introvert and often requires Nagi, her best friend, to speak for her. In the future, she becomes the manager of the Kuma River Rafts.
Minoru Minokasa (蓑笠 穣, Minokasa Minoru)
Voiced by: Daisuke Sugiyama (credited as Makoto Sakura in visual novels)
A blacksmith who is the owner of the Minakasa blacksmith shop and Nagi's grandfather. Is noted as one of the few people remaining who has the skill to repair locomotives.
Kiyoharu Akai (赤井 清春, Akai Kiyoharu)
Voiced by: Yukimasa Obi (credited as Izuru Mutsu in visual novels)
Head priest of a local shrine. Is often speculated to have had some experience in the operation of railroads.
Yubi Toro (登呂結比, Toro Yubi)
Voiced by: Konomi Moriyama (credited as Haruno Shioka in visual novels)
An elderly woman who is the owner of the Tororuyu public bathhouse. Is said to have been a technician of the Imperial Railroad in the past. She was previously credited under the moniker of "Tororuyu Owner (登呂流湯主人, Tororyūyu Shujin)".
Mototada Hōshō (宝生 元忠, Hōshō Mototada)
Voiced by: Kōichi Sōma (credited as Kengo Nishioka in visual novels)
Father of Kisaki Hōshō and president of the Kumamoto Bank. His wealth allows him to have great influence over numerous things.
Navi (ナビ, Nabi)
Voiced by: Reiko Anzai
Sentient navigation system of Sōtetsu's Aircra. Hachiroku was initially hostile towards her but slowly warmed up.
Nagare Hayase (早瀬 流, Hayase Nagare)
Voiced by: Seiichirō Konno (credited as Makoto Tono in visual novels)
Fukami's grandfather; he used to be the leading crewman of the Kuma River Rafts. In retirement, he works voluntarily for the railroad as a patrolman and performs track maintenance.
Seki Hayase (早瀬 堰, Hayase Seki)
Voiced by: Ryō Sugisaki
One of Fukami's grand uncles. In retirement, he works voluntarily for the railroad as a patrolman and performs track maintenance.
Osamu Hayase (早瀬 治, Hayase Osamu)
One of Fukami's grand uncles. In retirement, he works voluntarily for the railroad as a patrolman and performs track maintenance.
Kagetsu Urakami (浦上香月, Urakami Kagetsu)
Voiced by: Asami Nakamura (credited as Mao Tachibana in visual novels)
Employee of an Aircra factory in Ohitoyo. Currently works at the Ohitoyo Branch of the Kumamoto Bank as Kisaki's secretary and personal assistant. Her androgynous appearance often leads her to be mistaken for a man.
Unzan Nagayama (永山 雲山, Nagayama Unzan)
Head priest of the Eizanji ghost temple. Tends to avoid advice given to him.
Noriko Nagayama (永山 典子, Nagayama Noriko)
Voiced by: Nanae Sakurai (credited as Rie Hoshika in visual novels)
Wife of the head priest of the Eizanji ghost temple. Formerly worked as kitchen staff on the Imperial Railroad; runs a crêpe and pastry shop in Ohitoyo in retirement.
Michiko Sogō (十川 路子, Sogō Michiko)
Voiced by: Tomosa Muruta (credited as Chika Ashiwara in visual novels)
Twin sister of Sōtetsu who died in a railway accident of which the latter was the only survivor in the family. Apparently not fully aware that she has died, she continuously wanders the trains around the area as a ghost.
Niiroku (ニイロク, Niiroku)
Voiced by: Yukina Fujimori (2016 – 2017), Rin Osawa (2018 – present, credited as Yumu Akatsuki in visual novels)
A long-disused Raillord manufactured near the end of the Imperial Railway's existence. She is the personification of the JNR 181 series electric multiple unit, with her name being taken from the KuHa 26 control cars. Has a very aloof personality and speaks with a monotonous tone but has long desired to return to service. In her first few appearances, she obscures her face with white bandages. She later comes under the ownership of Akai.
Kon (コン, Kon)
Voiced by: Airi Ishihara (credited as Yui Ogura in visual novels)
A red fox which wanders around Ohitoyo Station. Communicates using yips.
Honoka Saitō (斎藤 帆香, Saitō Honoka)
Voiced by: Kumiko Nakane
Head brewer of the Migitachi Brewery. Speaks with a heavy Kumamoto drawl and recognized Hibiki's artistic talents from a young age.
Iyori Miyamoto (永山 雲山, Miyamoto Iyori)
Long-standing employee of the Ohitoyo Municipal Council. Reliable and well-respected, she has been active in the town's affairs since Paulette's father was mayor.
Olivi (オリヴィ, Oribui)
Voiced by: Chiyo Ousaki (credited as Komachi Shirai in visual novels)
A young-looking raillord imported from the United States, operating for over a hundred years on the Mikan Railway. She is the personification of the Fuji Minobu Class 1 0-6-0T steam locomotive, a copy of the JGR Class 1240 (ja) steam locomotive. She represents locomotive number 9 built by Baldwin.
Jinroku Munakata (宗方 甚六, Munakata Jinroku)
Voiced by: Ichirō Shōwa
Olivi's former engineer who worked with her on the Hiso Mikan Railway. Stoic, serious and a man of few words.
Hikari Migita (右田 ひかり, Migita Hikari)
Voiced by: Haruka Takagi (credited as Chiharu Umeki in visual novels)
Daughter of Sōtetsu and Paulette. Extremely shy.
Hiyoko (ひよこ, Hiyoko)
Voiced by: Juri Nagatsuma (credited as Ion Momoyama in visual novels)
A raillord acting as the director of a railway museum in Hinomoto, working to uncover the process behind the manufacture of raillords. She is the personification of the JNR Class C57 4-6-2 Pacific-type steam locomotive. She represents locomotive number C57 145.
Mori Geishū (芸州毛利, Geishū Mori)
Voiced by: Ai Fukada (credited as Saori Yukito in visual novels)
Owner and director of the Mori Electric Railway and a heiress of the Mori noble family. She has been using her wealth and standing to revitalize the rail transport economy in Hinomoto. Often credited as "Train Princess (電車姫, Densha Hime)"
Mikuro (みくろ, Mikuro)
Voiced by: Mari Kirimura (credited as Kirika Waō in visual novels)
A heterochromic raillord acting as a parts donor for Hachiroku, living a quiet life in retirement as a display piece in a zoo. Similar to Hachiroku, she is a personification of the JGR Class 8620 2-6-0 Mogul-type steam locomotive; she however is a personification of number 38696.
Suika (西瓜, Suika)
Voiced by: Ayaka Igasaki
A raillord who works on the Nakakuni National Railway. Fluent in Japanese and with a vast knowledge of railroad operations, she is very kind and always eager to learn more. She is the personification of the China Railway DF4 electric locomotive, representing locomotive 4 2000.
Suika also appears in both seasons of the anime, also voiced by Igasaki.
Liu Zhihuan (劉 志寰, Ryū Shikan)
Voiced by: Ryō Azuma (credited as Rio Raiba in visual novels)
A young engineer on the Nakakuni National Railway and Suika's current driver; his father was Suika's previous driver. Has a crush on Suika.
Jiang Yehuang (姜 叶煌, Kyō Yōkō)
Voiced by: Kanoko
Secretary of the Deputy Director of the Railway Department of the Nakakuni State Council. A friend of Kisaki, she invites Sōtetsu over to Nakakuni to help with revitalizing the railway network there.
No. 19
Voiced by: Ren Ke (credited as Kokomi in visual novels)
A raillord who works on the Baiwa Railway. Living a leisurely life with the flora and fauna of the area, she takes Sōtetsu and his friends on a sightseeing trip around Nakakuni. She is the personification of the Jiayang Coal Railway Class ZM16-4-C2 0-8-0 steam locomotive, representing locomotive 19.
Konta Gotō (後藤 塊太, Gotō Konta)
High-ranking individual of the Ohitoyo Railway. Has a strong will and is willing to do whatever it takes to get him to the top.
Chikage Nakamura (中村 千景, Nakamura Chikage)
Nagi's friend and rival, seeking to outdo her in most things. Always prepared, her results are consistent.