The Japanese manga series Daemons of the Shadow Realm features an extensive cast of characters created by Hiromu Arakawa.
Creation and conception The concept of the Daemon originated from the idea of humans forming contracts with supernatural entities. Despite their otherworldly nature, manga author Hiromu Arakawa intended for her human characters to develop friendly bonds with the daemons akin to ordinary human relationships, a dynamic that became central to Yuru's interactions with Left and Right. Arakawa stated that the characters Right and Left, who assist Yuru, were originally conceived around the time of her debut as a manga author, though at that stage they existed only in prototype form and lacked fully developed personalities.
The twin motif was one Arakawa had contemplated for some time prior to the manga's serialization, and she sought to endow their origins with a mythological quality to enhance their visual and narrative impact. During the planning phase, she explored various possibilities for their ages. To complement Asa's early antagonistic role, Arakawa chose to give her black hair and dark clothing; conversely, Yuru was assigned opposing colors to establish a strong visual contrast. Certain aspects of Yuru's character development were informed by Arakawa's own childhood experiences. She did not intend to present a curse narrative per se, but rather to evoke an unsettling atmosphere through the twins' backstory. Given that Yuru and Asa had been separated for an extended period, Arakawa did not portray them as closely bonded siblings. Consequently, she did not regard their relationship as a conventional brother–sister dynamic; instead, she depicted Asa as markedly polite toward Yuru, including the use of Japanese honorifics. Nevertheless, from the outset of the series, Arakawa had already determined that they would ultimately develop into genuine equals.
Main characters Yuru
is Asa's older twin brother. He is a blond-haired boy who embodies the Night and commands the Left and Right Daemons, which resemble powerful female and male warriors, respectively. Rescued from the village by Dera and Hana during the massacre, his primary goal is to find his younger sister and parents, and uncover the cause of the conflict unfolding around them. Including finding out why his sister's comrades killed adults in his village and taking revenge on them. As someone who has spent his entire life in a village preserving the Edo-period way of life, Yuru acts like a traveler from the past, unprepared for modern life, yet quickly navigating complex situations thanks to his advanced hunting skills.
Asa
is Yuru's younger twin sister. She is a tall, masculine girl who embodies the Day and whose Daemon is currently unknown. Although she displays a very tough character and a readiness for violence in critical situations, she is also a reliable friend to Jin and Gabby, and has a pronounced brother complex towards Yuru due to their long separation. She actually left the village at a young age with her parents, and a "False Asa" (later revealed to be Kiri) with a more idealized personality and the ability to regenerate lived in the settlement in her place.
Danno Household Ryu Tadera / Dera
, known as , is a middle-aged man with slightly gray hair, initially portrayed as a traveling merchant, who serves as a link between the villagers and the outside world. In reality, he is a member of a long line of skilled warriors, capable of defeating a group of soldiers unarmed, and sent by his family to rescue and protect Yuru from hostile or dangerous individuals seeking to exploit him. He works in tandem with Hana, and occasionally flirts with her, half-jokingly convincing her to marry him as part of the cover story of his new young wife and stepmother to Yuru.
Hana Danno
is a young woman who helps Dera protect Yuri and wields two Daemons named Kodetsu and Jiro. Although she sincerely helps protect the boy, she reluctantly accepts the cover story of being Dera's young, new wife, even though she actually dreams of Jason Statham as her ideal man.
Azami
is a shy little girl from Higashi Village and one of the few survivors of Gabby's attack on the village. She later resides on the Danno household after being kidnapped out of the village as a hostage along with Kiri, fearing of what consequences the village would do to her for secrecy.
Ken Tadera
is Ryu's Ethiopian 13-year-old half-brother. He is sensitive, shy and inexperienced with Daemons. His Daemons are the pair Tenaga-Ashinaga.
Roei Tadera
is Ryu and Ken's father and the previous head of Tadera Family, known for his great strength and skills as protector of the village. Despite his reputation, he is also an fan, especially of Hikaru's work. He regularly uses a scarf and glasses to mask his face after being disfigured by an unknown assailant from the ruins of Nishino Village.
Kagemori Clan Jin Kagemori
is a reliable senior member of the Kagemori family, whose Daemons are Ai and Makoto. He is the youngest child of the family.
Gabby
is a blonde teenage girl with a Daemon shaped like a floating pair of teeth with eyes named Gabriel. Although she is initially introduced as a cynical and cruel killer who kills anyone regardless of gender or threat, she is also shown as convincingly not harming children, and acting like a normal teenager when interacting with her friends.
Gonzo Kagemori
is the head of the Kagemori clan, whose kind appearance hides his authoritarian and self-serving nature. However, he actually cares about his clan and the people who work with the clan. He has several Daemons, the pair called , the Centimanus and the Uyamuya.
Asuma Kagemori
is Jin's older half-brother, whose Daemons are Yozakura and Asagiri. Asuma is an ominous person who usually gives the wrong impression since he acts suspiciously and attracts a lot of attention.
Hikaru Kagemori
is Gonzo's kind and overweight oldest son and heir of the clan, who spends most of his time as a manga artist under the pen name . His main Daemons are , as well as the Centimanus and the Uyamuya. He later becomes the head of the Kagemori clan after Gonzo's death at the hands of Misasagi.
Hayato Shing
is Asuma's maternal uncle. He is highly intellectual and self-centered, believing himself to be superior to others. He commands the Daemons Fujin and Raijin.
Iori Shingo
is a member of the Shingo family until she met Gonzo who invited her to be part of his family and they eventually had a son, Asuma. She was the previous master of Yozakura and Asagiri.
Haruo Kuroya
is the youngest of the Kuroya foster siblings. He is kind, but fiercely loyal. His Daemons are Torty and Bunbun.
Natsuki Kuroya
is the oldest of the Kuroya bodyguards. She is very diligent and serious about her job, but loving to her family. Her Daemons are the traditional Japanese demon-looking Jijimaru and Babamaru, who form the pair .
Fuyuki Kuroya
is the second child of the Kuroya family, a calm and quiet person. His Daemons are Whisper and Embrace, who form the pair . Whisper is a manuscript-shaped tsugai, that can obtain all the information about a person through their tsugai once it is held by Embrace.
Sakurazawa
is the head doctor for the Kagemori clan, who dislikes treating wounded, despite her uncompromising professionalism.
Makoto Tachikawa
is one of the mercenary Daemon wielders, who was hired to attack the Kagemori estate to retrieve the twins. Following their defeat, Gonzo recruits her to the family and offers to pay for her sick mother's treatment. Her Daemons are the pair , composed of Akai, a yellow fox spirit that can extend its tail and turn it into a net; and Midori, a brown raccoon spirit that can shapeshift into anyone.
Keiichi Hamura
is a negligent Daemone wielder and mercenary, who took the job to attack the Kagemori estate in order to square off his debt. Following his defeat, Asa uses Break to liberate his Daemons and he is recruited as a foot soldier.
Higashi Village Yamaha Ono
is the elder leader of Higashi Village. While she cares about her village, she is opportunistic and desires to use Yuru and Asa.
Kyoka
is a Higashi Village retainer, Nagisa's childhood friend supporting Yamaha. Unlike other residents who wish to exploit the twins' powers, she sympathizes with them and wants them to live normal lives. Her Daemons are the pair called Zashiki-Warashi.
Mine
is a Higashi Village resident and the father of Yuru and Asa. He is a kind man and a great hunter.
Nagisa Kinjo
is an outsider from Okinawa Island who accidentally discovered Higashi Village, where she fell in love with Mine and gave birth to Yuru and Asa.
Yama
is a radical shaman connected to the Higashi village network on the Lowlands, and Dera's supplier. His Daemons are and .
Nishino Village Misasagi
is the owner of a Chinese restaurant called West Wind and a resident of Nishino Village, who seeks to obtain Yuru and Asa's power. He is a carefree, but calculating man with several red tattoos on his body. His Daemons are the formless . Heaven manifests as a star, that can make things rise or its targets receive an upward blow. Earth manifests in shadows on the ground and can make a target touch the ground or strike them downwards.
Hidekatsu Daigo
is a broad, burly and bearded resident of Nishino Village, who prides himself in his great physical strength. His Daemons are the pair , composed of Masochist and Sadist. Masochist is a deformed mass with eyes and a mouth, but only says things to get hit more (due to its masochistic nature). Sadist is a small humanoid figure, with greater fluency, even capable of saying hurtful things.
Nagitsuji
is an apathetic resident of Nishino Village, who has a childlike appearance. His parasitic Daemons are the pair , composed of Sodom and Gomorrah. Sodom is placed in the user's heart, while Gomorra is placed in the user's hand, allowing one to listen through the parasites deposited by them.
Minase Ono
is a manipulative former priestess from Nishino Village and Yamaha's older twin, as well as Akio's biological mother. She possesses part of the "Seal" ability, which she used to prevent herself, her sister, and Akio from aging and to block Akio's pain senses. She has a Daemon that takes the form of a one-eyed bird.
Ivan Yosano
is a bloodthirsty assassin affiliated with Nishino Village and the alleged murderer of Mine and Nagisa. He proficiently uses his Daemons in battle, the pair called Magatsuhi, composed of Daikyo and Shokyo.
Akio Kuroya
is an expressionless member of the Kuroya family, who serve as bodyguards to the Kagemori clan. However, he is actually a spy from Nishino Village, tasked with killing Yuru and Asa once they are reunited. Akio was born unable to feel pain, though it is implied that his mother sealed his ability to feel pain. His Daemons are the giants Yamakaze and Tanikaze, who compose the pair .
Anna Mineyama
is a seemingly normal high-school girl working for Ivan as a cleaner, but she is actually a jealous woman with a crush on him. Her Daemons are the pair , composed of the beetle-shaped Taro and Hime. Taro has the ability to roll corpses into meat-balls, while Hime has the ability to lay eggs in the balls that Taro creates.
Daemons Left
is formerly the left statue in the settlement. She now takes the form of a muscular, tall woman reminiscent of an . Like Right, she values strength and communicates in an old-fashioned manner, but in contrast, she has a more phlegmatic personality.
Right
is formerly the right statue in the settlement. He now takes the form of a large, very muscular man reminiscent of an . He possesses the mentality of an old-fashioned, communicative warrior who relishes battle, but is completely devoted to his master's commands.
Gabriel