Shinoa Hīragi is a member of the Hīragi family that rules the Japanese Imperial Demon Army. Also a member of the Moon Demon Company she is close with the Lieutenant Colonel, Guren Ichinose. She would become a squad leader with Yūichirō Hyakuya as a member in addition to Yoichi Saotome and Shihō Kimizuki then Mitsuba Sangū as well. Shinoa interacts with various other characters throughout the Seraph of the End series, which affects herself and the story. This article details Shinoa's relationships with other characters.

Japanese Imperial Demon Army

Family

Mahiru Hīragi

Shinoa's older sister who helped with the development of cursed gear. Her desire for power and love was manipulated by her demon and she was used as a pawn for a greater plan thus she was eventually taken over by the demon. She was romantically involved with Guren Ichinose who Shinoa thinks killed her to acquire a weapon, however unknown to Shinoa is that Mahiru killed herself. Shinoa and Mahiru were rather close compared to their other siblings.

Also unbeknownst to Shinoa is that Mahiru requested that Guren pass Shikama Dōji to her so that Shinoa could survive the apocalypse. It eventually becomes her Cursed Gear scythe. Shinoa reveals that Shikama Doji may have possessed her sister when she owned it at some point. Shinoa was protected by Mahiru from Shikama Doji's possession until she was capable of handling it herself.

Shinya Hīragi

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Her adoptive older brother, they are both friends with Guren. In the light novels, Shinya is shown to be kinder to Shinoa than the other Hīragis. Shinoa would receive his assistance when they worked together with Narumi's squad during battling in Nagoya where they defeated vampire noble Lucal Wesker. Helping Shinya to walk after rescuing him from thirteenth progenitor Crowley Eusford with Chess Belle and Horn Skuld, Shinoa would also comply with Shinya's direction to calm Yu down after he did not want to leave Guren behind. With uncertainty of their situation at arriving at Nagoya airport with no rescue in sight Shinoa looks to Shinya and is happy with his decision to head back and rescue Guren.

Kureto Hīragi

Shinoa's half-brother where they have a very distant relationship. They share the same father, Tenri Hīragi. He only cares about carrying out his duties as he tortured Shinoa at a young age. In the battle at Nagoya airport after Shinoa ran from his offer of being saved from a massacre he was prepared to sacrifice her for the seraph to work without a care, despite being siblings.

Seishiro Hīragi

One of her half-brothers who is a part of the Japanese Imperial Demon Army.

Tenri Hīragi

Shinoa's father. Her sister Mahiru overshadowed Shinoa so much that he never even met with Shinoa. He displays no interest in her.

Moon Demon Company

Shinoa Squad

Yūichirō Hyakuya

Shinoa acted as an army surveillance officer to watch Yu under a school setting until he made friends. She introduces herself and her purpose when Yu is not co-operating with the class teacher. Offering pointers on what he could say to make friends, Shinoa reports on him and watches him when they enter the training classroom for the Moon Demon Company. Later, Yu joins her squad where she still enjoys teasing him. Shinoa acknowledges his fighting capabilities of which she is impressed with and is pleased to see his developments such as asking whether they should retreat when facing a stronger foe. Shinoa is asked by Guren whether she has developed feelings for Yu, and she occasionally blushes when in close contact with him. However, she says she is uncertain about her own feelings, and Yu is oblivious to them. Understanding that Mika was Yu's family first Shinoa greatly respects Yu's resolve and feelings towards saving Mikaela and she agrees to help save him knowing he will do so anyway.

Later on, during a conversation with her demon Shikama Doji, Shinoa admits that she is jealous of Yu for being able to get attached to people and instinctively act on his feelings to protect them. She laments her own inability to act on her desires. Shinoa sacrificed herself to save Yu and his demon, Asuramaru from being overcome by Shikama Doji, becoming possessed by Shikama Doji as a result. Learning that Guren is heading for Yu she intends to help Yu.

Yoichi Saotome

Finding him being bullied Shinoa encouraged Yu to intervene. Clear that Yoichi was Yu's first friend, Shinoa took Yoichi for herself in a group activity so Yu had to join Kimizuki and stated that they would be the best group. They attend the same classes together and Shinoa is alarmed when Yoichi is possessed by his demon where Guren has ordered him destroyed. Yoichi would become a part of her squad she leads yet Shinoa is curious that background records on him have been deleted. They are on very good terms with each other and get along well as teammates.

Shihō Kimizuki

Before becoming Yuchiro's supervisor, Shinoa supervised Kimizuki and tried to teach him how to make friends. She was aware that Kimizuki had picked a fight with Yu who fought back but preferred to enjoy the show. He later joins her squad under her command. Shinoa was upfront on what Kimizuki would do if she really were manipulating squad members but agreed to discuss the matter as a team where they would be honest with one another. Although his swift response time makes him more difficult to tease than other members of her squad Shinoa would find a way by teaming up with Mitsuba to act as him and Yu being more than friends as a joke once.

Mitsuba Sangū

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Shinoa and Mitsuba have a history together, and Shinoa often addresses her as "Mitsu" ("Mi-chan", in the original Japanese text). She is pleased that Mitsuba is joining her squad and so under her command. Shinoa teases her about having a crush on Yu. They often team up to tease the other squad members and they are the closest pair in the squad. On more than one occasion Shinoa has commented on the size of Mitsuba's bust and appears wary at how much larger it is than hers.

Guren Squad

Guren Ichinose

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Shinoa works for Guren rather than the Hīragi family. They have a close relationship with Shinoa acting beyond her years around him. She follows his orders such as when she kept watch eye on Yu Shinoa was angered at feeling that Guren was behind Yu's transformation and more so at hearing him invoke his sister's name when using his weapon. He loved her sister, Mahiru Hiragi, who became the demon in his sword. Gathering her squad they decided whether they should stick with Guren when he could be using them to intimidate army higher ups and agreed to do so. Shinoa maintains trust in Guren but was taken aback when her jovial answer as to why they were late to the Ebina rest stop was shut down and she was shouted at. Rather than Yu it was Shinoa who was the one Guren wanted to punish as she had never experienced what it was like to lose someone. Shinoa became confused when he slaughters many of the humans and stabbing Kimizuki in Nagoya airport.

Sayuri Hanayori

A teacher and member of Guren'd squad, Shinoa feels free to parade Yu's zero mark test around the class. They would be in the same battles in Shinjuku and Nagoya.

Mito Jūjō

A member of Guren's squad who Shinoa takes part in a practice fight against along with Guren and Shinya. Whilst Shinoa plans for her and Mitsuba to engage the colonel Shinoa is then prevented from assisting her squad mates further in the skirmish when Mito steps on her scythe and pinning it to the ground.

Shigure Yukimi

Unknown to Shinoa she and her squad are monitored by this member of Guren's squad when they clear out a vampire lair and free the humans within.

Narumi Squad

Makoto Narumi

Both squad leaders, Shinoa defers to Narumi's judgement in their joint mission but still adds her input. The two shake hands in partnership. When Shinoa lets Mikaela escape she is blamed by Narumi Squad for their comrades death, even by Narumi. Even after being threatened with unsanctioned corporal punishment afterwards, Shinoa protects Makoto from an incoming attack from a vampire. After a few months, the two seemed to have reconciled.

Rika Inoue

The two have not been acquainted for long. The first time they are seen in actual contact is when they take part in a joint mission to defeat Lucal Wesker. After the Demon Army arrive at Shinjuku airport and Shinoa is approached and struck by Rika who blames Shinoa for her friend's deaths. She is threatened by Rika's sword and told she must pay. After apologising Shinoa is yelled at and told to give her friends back until Narumi and then Shinya calm the situation.

Shusaku Iwasaki

They take part in a successful operation to defeat Lucal. He escapes the vampire's ambush after Mika escapes with Yu due to Shinoa squad's actions and heads to the airport with everyone else.

Taro Kagiyama

Shinoa squad and Narumi squad of which Kagiyama is a part of defeat their target without any casualties on their side. Later Kagiyama is killed by vampires when they are ambushed after Shinoa's allows Mika to escape with Yu.

Yayoi Endo

She fights with Yayoi during the vampire noble extermination mission. Due to her actions of allowing Mika to escape with Yu, Yayoi is killed by vampires when they are ambushed.

Vampires

Mikaela Hyakuya

Shinoa first met Mika when they were eight years old, while she was delivering messages from her sister, Mahiru Hiragi, to Guren. Eight years later at Shinjuku, they meet on the battlefield, however they do not remember or recognize each other. Shinoa was saved by Mika at the risk of his own life from Yuichiro when he suddenly goes berserk. She asks why and is ordered to get her filthy hands off Yu when she embraces him on Guren's orders to calm Yu. Shinoa keeps her promise to Yu to help him save Mika in Nagoya when she defends Mika from her compatriots in the Moon Demon Company. She even attacks Major General Shinya Hiragi to save Mika's life, and was labeled as a traitor as a result. Shinoa allows Mika to escape with Yu and tells him to meet up with them at the Nagoya Airport later on. Thanks to her intervention, the rest of her squad joins her, and Mika is able to flee with Yu. By the time the battle in Nagoya comes to a close, Shinoa is helped to escape the Demon Army and the vampires by Mika. Having prepared blood collected from the squad for him she is patient with Mika's distrust specifically concerning the experimentation on Yu. She calls for Mika's involvement to also get him away from interacting with Ferid. Shinoa eventually becomes one of the few humans Mika places trust in so far.

Crowley Eusford

A vampire noble and Progenitor. They encounter him when they head back to the stronghold after their first given mission and engages in a short round of combat with him. Although as the one issuing directions she is targeted by him in the end he withdraws and they are spared. Later when they are defeated in Shinjuku, Shinoa is pinned down by Crowley and has her blood drained. Later when Crowley defeats Tenth Progenitor Fuola Honte, Shinoa states she does not mind having a strong ally.

Ferid Bathory

A seventh progenitor that Shinoa first meets at Shinjuku. Later Ferid meets Shinoa Squad to take them to the Progenitor council. She agrees that they must first betray him before he betrays them, however they agree to work with him because they cannot trust anyone else. With no other recourse to fight or defend against Ferid's tactics such as showing the head of a family member to Yu, Shinoa is subdued as she guides her squad to get onto the bus. She is happier with him not in their presence. After rescuing him for the information he has access to Shinoa is greatly alarmed at turning to see what the show is that Ferid mentioned was behind her. At seeing Ferid naked and in a state of regeneration Shinoa resorted to her scythe to cut Ferid's head off. She sees Ferid near her when the first is possessing her.

Krul Tepes

After deciding to rescue the vampire queen and failing Shinoa would find her again after escaping Demon Army territory together. After becoming and finding Krul enter the room Shinoa would regard her as a new challenger approaching.

Ky Luc

A fifth progenitor that the squad combined with Crowley were to attack to free Krul and Ferid who were undergoing sun exposure torture.

Chess Belle

A seventeenth Progenitor and Crowley Eusford's aide alongside with Horn Skuld, serving under Ferid Bathory's faction. Shinoa's squad encounters her when they engage in combat with Crowley as they are heading back to the stronghold. Later when they are defeated in Shinjuku, Chess defeats Mitsuba and drinks her blood.

Horn Skuld

A seventeenth Progenitor and Crowley Eusford's aide alongside with Chess Belle, serving under Ferid Bathory's faction. Shinoa's squad encounters her when they engage in combat with Crowley as they are heading back to the stronghold. Later when they are defeated in Shinjuku, Horn drinks Kimizuki's blood.

Lucal Wesker

A fifteenth Progenitor of Lest Karr's faction and stationed at Nagoya. They defeat him as their assigned mission to take down the nobles in that area.

Esther Lee

A servant of Lucal Wesker. He is sacrificed as a meat shield when they ambush the vampire to kill him before Shinoa engages his master Lucal.

Demons

Shikama Dōji

After her sister Mahiru extracted the demon from her, she forgot all about him. She regains her memory of him after Guren passess her Shikama Doji by Mahiru's request.

Shinoa has become very affectionate and playful towards Shikama-Dōji, always calling him "Shi-chan". The two shared the first character in their name, which alone, can mean "Four" or "Death". In Chapter 66 he reveals his true personality, saying that Shinoa loves Yu and she is much stronger than her sister Mahiru. In Chapter 72 Shikama Doji start acting on his own and manifests without Shinoa permission, He tempts Shinoa repeatedly such as saying way to turn Mika into a human and return Yu humanity. He reveals that he is not actually a demon and would happily possess her instead of Kureto, this conversation angers Shinoa as she tells him to shut up to the point of shouting and silence him in rage which then she wakes up and states he may have possessed her sister Mahiru. She was able to fend off Shikama Doji possession for a long time thanks for Mahiru protection. He later invades Yu's heart for the intent to draw out Shinoa to possess her, which the latter succeeds. Shinoa's humanity and heart are now gone as Shikama Doji has complete control over her body.

As her host he protects Shinoa all the time as shown when Ferid tried to kill her, he mercilessly cut down Ferid in half and sliced off his arm which he wields his sword, and later prepares to attack Guren, Shinya, Kureto and Mika. After Saito has arrived he engages in a battle against Shikama Doji who's in Shinoa's body with the goal of restraining him.

Shikama Doji later leaves Shinoa's body due to the sinful keys which were used by Guren, Mahiru and Noya. In care that her body would break. This also seals him away 'for the time being' which he brings up before leaving her body.

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