Family
Jyuihirou Kiyokawa
Hiroto's father who was a geologist.
Sumika Kiyokawa
Hiroto's mother.
Close Friends, Allies and love interest
Sōichirō Sōda
Hiroto's classmate and childhood friend. Unlike Hiroto, Sōichiro is excels in his studies and often fantasize about meeting elves. He also transported to the world of Hybride alongside with Hiroto via a magic map he brought from a local book store.
Mimia
Hiroto with Mimia.
Mimia is the first Mummy whom Hiroto met and interacted during his first mission at Solum capturing the vampire. Unlike other residents in Hybride, Hiroto doesn't fear Mimia but he finds her cute and beautiful instead which prompts the mummy blushed nervously. Since that day, Mimia becomes Hiroto's one of prominent allies throughout his journey in the new world: from his rise as the Lord of Solum to his various adventures within or outside Hybride, including his rivalries against any enemies. Due to her and Valkyria's pivotal role in his adventures, Hiroto views both of them as the most important people in his life especially with Mimia confessing her own feelings for him since him, despite an outsider from his original world, being the only person doesn't discriminate against her.
Valkyria
Valkyria and Hiroto
Valkyria is a rouge vampire who once attacks Solum's Mora village. In their first meeting, Hiroto was originally caught by Valkyria during his mission in capturing her-a mission that was requested by Ulkan and Sentelio in order to save Solum from bizarre incidents regarding the vampire's attacks onto Solum, of which resulting the dimming Spirit Light in the church. In the scuffle however, Hiroto is immune to Valkyria's bite and, with the help of Sōichirō and the bandage given by Mimia, he successfully captures her. Still, Hiroto didn't want to kill Valkyria so he negotiated with Ulkan and Sentelio about new policies that frees her instead. Since then, Valkyria visits Hiroto and enjoying teasing him and wants his blood.
Like Mimia, Valkyria also becomes one of many become a pivotal figure to Hiroto's adventures in the new world and also one of his love interest.
Sorceire
The daughter of Darmur the Lord of Neka.
Hybride
The kingdom where Hiroto currently resided and its major champion for defending it from any enemies that are attacking the kingdom, and his reputation as the Diferente makes him as an important figures in the kingdom. As the stories goes on, Hiroto becomes Hybride's most important person in the continent in ensuring the peace.
Sentelio
The steward to Ulkan of Solum.
Excelis
The elven castle lord of Primaria and a former political rival for the upcoming election as Salabria's State Sheriff.
Gezerkia
Alvy
An Elf who hails from Secondaria and one of his close allies. In their first meeting, Hiroto meets Alvy who wishes to see him after he became Ulkan's successor as the new Lord of Solum.
Torlan
Hiroto's feud with Torlan.
Steward of Secondaria who belittled Hiroto due to Solum's practice of following the Ibrid System that houses the populations of Other Species. In their first meeting, albeit a messenger's invitation, Hiroto was asked to have Solum joining the Secondaria Alliance which he rejected. As the result, Hiroto was "punished" by Torlan as the latter sabotaging Solum's chances of improvement, such as expelling Solum students from studying at Secondaria Cathedral. That was until an incident of bandits' (who disguise themselves as the "Mummies") raid onto the cathedral forced Hiroto to save Torlan despite knowing the latter's stubbornness and ungratefulness. Their bad blood worsen when Hiroto helped Darmur-the Lord of Neka and member of Secondaria Alliance-to find and recover a missing Sorceire and then breaking her curse by buying her flowers, which consequently gaining Darmur as his allies. With his increase popularity, Hiroto is viewed as an enemy by Torlan.
Neka's declaration in stopping Secondaria's Development Plan further fuels their bitter rivalry where Torlan purged merchants from Solum and Neka from Secondaria in order to secure Secondaria's Development Project. However, throughout a heated debate against his rival, Hiroto outsmarted Torlan by claiming that what the latter did only endangering Hybride in the future. This feud however doesn't end as Torlan resort of following his master Feuillet's plan to retaliate by framing Solum for the tragedy at Natra and Neka, though the ploy is foiled as Hiroto manages to save both Neka and Natra from their ill fate by not just restore the Spiritual Light at Natra, but also saving Sorceire's life again from the intruders.
Feuillet
The Lord of Secondaria who return to Secondaria after hearing Torlan's defeat by Hiroto. While never seen the lord in person, Hiroto is warned by Alvy to be vigilant due to Feuillet's extreme cunning. Even after he rescued both Natra and Sorceire, Hiroto's feud with Feuillet still not over as the latter trying to sabotage his rise by any means necessary.
In Volume 4, Hiroto's feud with Feuillet intensifies when the Lord of Secondaria trying to make Solum suffer by
King Moldius I
The King of Hybride who rule the kingdom with benevolent and just. While Hiroto doesn't meet the king at first, his reputation as the new Governor of Salabria reaches Emperia but he was belittled. It is Moldius's 2nd mistake that almost got Hiroto being assassinated by Phyllis when the Diferente was defamed as the "traitor" due to Phyllis scheme, of which the king fell for it.
Panopticus
The Prime Minister of Hybride and a member of the Privy Council of Phyllis who once proposed of abolishing of Ibrid System.
Sobrinus
The Archbishop of Hybride and a member of the Privy Council of Phyllis who, unlike Sobrinus, support of Ibrid System in Hybride. Panopticus is Hiroto's only supporter
Raquel
A exiled princess of North Phyllis Kingdom who went exile after her former kingdom fallen to King Esh's rule when the former established a reunified kingdom.
Joachim
Felkina do Lalente
The Countess of Sigil who antagonizes Hiroto and his attempts for having a peace negotiation with Phyllis due to her hostility against Phyllis's annexation of her former home country (her mother was a noble from that country), as well as her father's demise 7 years ago. This rivalry between the 2 however is one-sided for Felkina as her belittlement against Hiroto stems from her illustrious background and her haughtiness as a noblewoman.
Hiroto and Felkina.
Despite being spared from execution, Joachim's imprisonment didn't ends Felkina's one-sided grudge against Hiroto despite she herself rewarded him with jewelries. During his feud with Magia in Volume 13, Hiroto tried to contract with Felkina with letters but she ignored them because of her said grudge and its only until the pincer attacks from both Magia and Phyllis, alongside with Belffergo's plot to reduce vampire's prowess, makes Felkina realizes the vampires' significant role to Hybride's defense to (reluctantly and unintentionally) help Hiroto by not only revoking the probation just one day after she "approved" it, she also informs him about the sinister plots of Belffergo and Rasmus. Even after his victory, Felkina refused to acknowledge Hiroto until Moldius pardons her and allowed Joachim to visit her via Hiroto's request, of which the king fulfilled it as his reward to the Diferente for his heroic deeds in saving Lusina. This event reconciling Hiroto and Felkina as the latter thanking him for his mercy, making her as Hiroto's new ally from this onwards.
Bourgault
A nobleman of Noblesia who was feuding with Hiroto over the rape of a mummy by his son Pollard. The execution of Bourgault by the vampires may ended Hiroto's feud with him, but it also makes him as a enemy to some aristocrats (such as the likes of Belffergo and Finnath) who still belittles and scorn the Diferente.
Belffergo
(To be added...)
Rasmus
(To be added..)
Finnath
The Finance Minister of Hybride and a member of the Privy Council of Phyllis who loathes Hiroto. Even to this day, Hiroto's rivalry with Finnath
Lemaire
(To be added...)
Leonidas
(To be added...)
Hydran
The Duke of Hybride who happens to be Moldius's cousin and Leonidas's uncle, making him a member of Hybride Royal Family.
Shifelis
Hiroto and Shifelis at Emperia.
The Deputy Archbishop of Emperia and Sobrinus's temporary replacement as a member of Hybride Privy Council. Unlike his interactions with other elves, Hiroto's relationship with Shifelis is rather rocky when he is scorned and belittled by the elven archbishop who calls him "immoral" while gives him an earful lecture about Spiritual Curse and the Elven Warth, all because he accidentally gazes at her bust during their first meeting. In fact, she is so hostile towards him that she, along with Hydran and Finnath, votes against him and Leonidas in becoming a member of Privy Council of Hybride in spite of Moldius's decisions. This leads to the conflict between Hiroto and Shifelis where the latter , making her as one of Hiroto's enemy.
Phyllis
Metis
One of renowned generals of Phyllis who was famous for her wisdom.
Gardel
(To be added...)
King Esh I
(To be added...)
Abrahim
(To be added...)
Freyas
Hiroto and Freyas.
The princess of Phyllis who is not only Eesh's niece and heir apparent, but also Hiroto's latest rival in her quest to restore Phyllis's former glory. Whilst listen everything about her from the Four Kingdom Summit, Hiroto eventually learns the princess's true capability when he heard that not even her subordinates such as Metis and Gardel can dissuade her from attacking Hybride.
Magia
Urseus
The King of Magia Kingdom and also Hiroto's arch rival due to his loath for the vampires as well as his cunning. In Volume 13, Hiroto, along with vampires, is viewed by Urseus as a "threat" to Magia due to his increasing influence in the continent, thus reviving a bitter feud between Hybride and Magia. During his feud against Magia, Hiroto finds Urseus as a formidable rival as he discovers the king's cunning plan almost cut him from Emperia entirely, courtesy of the ploy from Nestoria and Zalia. Even so, with his own cunning, Hiroto manages to outsmart both Urseus and his subordinate and rescues Hybride from Magia's invasion.
Volume 14 marks Hiroto's first meeting with Urseus as Hybride's (temporary) rime minister and their rivalry intensifies when the king vows to avenge his loss to Hybride via his alliance with his former mentors Cognadus and Dialogs, along with his "allegiance" with the Northern Vampires. Despite the conspiracy, however, Hiroto manages to overcome his ordeals by bringing Prince Leonidas up into the debate, resulting Urseus's second defeat in overall. Their rivalry culminates at Volume 15 when Hiroto defeats Urseus again in spite of his scheme with Abrahim via Disgurd's unexpected support but willing to chat .
Nestoria
(To be added...)
Zalia
Hiroto's first meeting with Zalia.
An elven prime minister of Magia and Urseus's avid supporter in his quest to crush Hybride by preventing Hiroto and the vampires from interfering his plans. Despite he didn't meet the elf herself, Hiroto viewed her as a worthy opponent due to her plot that almost isolating him from Emperia, though at the same time it piqued her interest about her as he wondered if she was an aloof and serious person to begin with. Nevertheless, he managed to outsmarted her by dispatching Sōichiro, Curele and Gezerkia to Emperia on his behalf while he led his allies to rescue Lunisia from the invading Magia Army, which he succeeded. Later, he encountered Zalia and gave her some advice about building relationship between kingdom while ensuring true peace, though this only intensify Hybride's rivalry with Magia as Zalia still viewed him as an enemy.
In Vol.14, they met again at the
Vol. 15 marks the end of their feud where Hiroto defeat both Urseus and Abrahim again at the second Four Kingdoms Summit despite their scheme, which only adding fuel to Zalia's hostility against him. Still, he willing to have a private talk with Zalia and gave her some advise that not only forced Urseus to question his own goal, but also forced her to seek Lagos for help while vacating her position.
Regulus
Cognadus
(To be added...)
Dialogs
(To be added...)
Agnika
One of the kingdoms from the West that is also an ally of Hybride.
[[[Lyndrus]]
(To be added...)
Gassel
(To be added...)
Other Species
Zeldis
The vampire who is the father of Valkyria and Curele.
Slara
A female vampire whom Hiroto encounters during his journey to Secondaria.
Luluk
Hiroto is tending a badly beaten Luluk.
Ever since then, Hiroto is seen as a father figure to Luluk.
In Volume 15, Hiroto and others are searching for Luluk who is gone missing while,
Disgurd
Hiroto's hostile confrontation with Disgurd.
A vampire who leads the Northern Vampire Clan of Magia and Hiroto's initial enemies due to her "alliance" with Magia (especially Urseus) in his quest to defeat Hybride. In his first meeting, Hiroto first witnesses Disgurd and her fellow vampires' harassing the people in Emperia but views it suspicious due to his knowledge of Urseus's hatred for the vampires and learns some truth about her via Gezerkia. They eventually interact with each other during the Four Kingdoms Summit at Regulus and before the meeting is commenced, Hiroto visits her but remains unfazed by even her own death threats and even teased her own looks by saying that her glare will ages her badly, making him as the first human who is not afraid of the Blue-Winged Vampire. Eventually, his amazing debate and eloquent rebuttal against Urseus and his other conspirators-with Cognidus, Dialogs and Abrahim his other partners-shocked Disgurd so much that she feels envy for both Zeldis and Gezerkia to have a capable human such as Hiroto.
In Volume 15, Hiroto's relationship with Disgurd slightly improved when she begrudgingly helps him during the Second Four Kingdoms Summit, of which Hiroto won. Still, it doesn't ease Disgurd's distrust for the Diferente as she still deems him untrustworthy even after telling him about Valkyria's missing mother. When Discurd eventually turns against Magia after hearing Luluk's vicious beatdown by vengeful Magia soldiers (more specifically, Aden soldier)-a line she would never cross, however, it is Hiroto's care for Luluk opens Disgurd's mind as this displays his genuine his bond with the vampires and causes her to ally herself with Gezerkia and Zeldis to attack Bahram while cutting ties with Urseus for good. Ever since that day, Disgurd and her clan becomes one of Hiroto's new allies.
Azan
Others
Ruki Akemiya
One of Hiroto's classmate during his childhood and the leader of the class's female students.
Shizuko Yamakawa
One of Hiroto's classmate during his childhood.
Kanai
One of Hiroto classmate during his childhood.