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Main Characters
The Three Reincarnators from Another World
In General
- Child Prodigy: Retaining their memories of Earth gives Rio and Liselotte a significant unfair advantage in primary school, due to already possessing university and high school knowledge at a young age, respectively. In particular, Liselotte winds up skipping several grades, learns magic quickly, and establishes a successful business, the "Ricca Guild", through ethical means.
- Fighter, Mage, Thief: Rio is the fighter who uses sword skills and martial arts he learned from Earth alongside his Spirit Art abilities, Liselotte is the mage as she is the only one of the three who can use conventional magic formulas, while Latifa is the thief who was raised to become a deadly assassin.
- Noodle Incident: While Haruto is shown explicitly getting killed in the traffic accident that also takes the life of Suzune and Rikka, the exact details as to why the accident even happened is never shown due to the bus driver being The Unseen during all of this, nor is any light shone to any other victims on the bus and whether or not they were also reincarnated.
- Reincarnation: All three are killed in the same bus crash and reincarnated in another world full of magic. Hailing from Earth, their reincarnations command advanced knowledge and great magic capabilities.
- Ripple-Effect-Proof Memory: Despite them dying on Earth, they are able to remember their past lives with great detail.
- Stalker with a Crush: Both Latifa/Suzune and Liselotte/Rikka constantly took the same bus as Rio/Haruto back when they were alive in Japan as the girls had an infatuation with him.
Amakawa Haruto / Rio Karasuki (Amakawa)
Voiced by: Yoshitsugu Matsuoka, Ayaka Suwa (young) (Japanese), Kieran Regan, Fionn Kinsella (young) (English)
Click here to see his undisguised appearance
Click here to see his previous life appearance
The protagonist of the story, Amakawa Haruto was Ayase Miharu's Childhood Friend in his past life on Earth, but he is killed in a traffic accident while taking a bus and is reincarnated as Rio at the start of the story. Regaining his Past-Life Memories at the age of seven, the dissonance between Rio's cynical personality and Haruto's moral upbringing clashes until he forms a balance, creating a mix of Rio's and Haruto's personality. He's contracted to Aishia, an upper high-class spirit.
- Adaptation Personality Change: In the Web Novel, Haruto is retained as Rio's dominant personality, while all other adaptations keeps Rio as the primary focus, but with Haruto's morals and values as the former's guidelines.
- All of the Other Reindeer: Because of his commoner backround, Rio is treated with disdain by all of the other students attending the Beltrum Royal Academy. While they look down on him initially due to his seeming lack of ability, they start hating him more when he slowly excels academically, earning top spot in his class on a consistent basis.
- Anti-Magic: Rio has one against the heroes' "Divine Weapons", namely by disrupting the magic that comes from the weapons themselves with his own Spirit Arts. This comes in handy when Sakuraba Erika tries to destroy a room with the King of Galarc, bystanders and Rio's friends.
- Awesomeness by Analysis: Rio is able to analyze the effects of sorcery and Spirit Arts even in the middle of a fight, can formulate Counter Attacks given enough time, or even replicate it if he can fully understand said sorcery/Spirit Art due to his status as an all-round combatant, which is exactly what he does during the second fight against Lucius Orgueil, where he uses a perfected version of Sakata Hiroaki's Yamata no Orochi, but with greater skill than its creator, to occupy the space to stop Lucius from teleporting away.
- Because You Were Nice to Me: The reason Rio never completely loses his trust for other people and closing off his heart is due to Celia Claire's constant interactions with him in his academy days, where he is otherwise alone, as Aishia can attest. This comes full circle when he decides he can't leave her to a life of misery and kidnaps her on the day of her wedding with her permission.
- Berserk Button: Rape (which Gon is too dumb to attempt in Rio's vicinity) and Lucius.
- Broken Ace: In his previous life, Haruto excelled at academics and martial arts, hoping he could become worthy of Miharu, but he lacked the confidence to approach her when it looked like she might already have a significant other. Rio's attempts to be the perfect gentleman also means exercising Self-Restraint to an unhealthy degree, to the point where he comes off as unnaturally polite.
- Childhood Friends: As Haruto, he was Miharu's; in his current life, Celia - Rio notes that he also treats her with respect as his professor.
- Dye or Die: Due to the fact that his black hair is considered unique and exotic in the Strahl Region, Rio has to use a magic artifact to dye it grey in order to keep his identity secret when he returns there from the Yagumo Region.
- Fights Like a Normal: Rio normally avoids the use of flashier Spirit Arts when fighting in front of other people and sticks to simply body enhancement techniques and the occasional wind-based Spirit Arts, both of which he passes off as his enchanted sword's abilities.
- Good Is Not Soft:
- After he nearly kills Gon for attempting to rape Ruri, Rio realizes that it's hypocritical of him to completely restrain himself from killing while also seeking Revenge on Lucius. From that point on, his stance on murder, coupled by Haruto's morals, is Averted when he kills slave-trading mercenaries in order to force the lead trader to surrender Miharu.
- In the cases where he doesn't kill an enemy, Rio remains ruthless in other ways, such as tricking Stewart Huguenot and Alphonse Rodan into signing disadvantageous contracts when they harass his party.
- Genius Bruiser: As a result of inheriting Haruto's memories, as well as his studies in the Beltrum Royal Academy and the Spirit Folk village, Rio acquires a wide assortment of knowledge including cooking, crafting and politics, in addition to improving his combat capabilities by a significant margin through studying under various teachers.
- I Just Want My Beloved to Be Happy: Deconstructed
- Rio does this to Miharu since he's also Oblivious to Love: he believes she'll be happier with Sendou Takahisa because she's been friends with the latter for most of her middle school days, while simultaneously fearing that she'll come to hate him for resorting to killing someone, not knowing that Miharu is still very much in love with him with he was Haruto on Earth.
- In the Web Novel, Rio's mindset about this trope leads to him not being able to communicate with Miharu effectively: by not telling her about his past life as Haruto and failing to realize that Takahisa lies to him about Miharu rejecting him, as a result, she winds up becoming far unhappier being with Takahisa than being with Rio.
- Insecure Love Interest: He has reservations on pursuing any sort of romance, beliving he might drag any Love Interest into his problems as he seeks Revenge.
- Little Hero, Big War: Despite his overwhelming power, Rio doesn't have much effect on the various political conflicts since he's mainly focused on his own personal goals of seeking Revenge and protecting his party until he's given the title of an "Honorary Knight" by the Galarc king, the same status as that of a count.
- Knighting: After defeating a group of assassins in Galarc, King François Galarc makes him an Honorary Knight and allows him to choose a surname - Rio decides on "Amakawa".
- Lightning Bruiser: Justified; with the knowledge and training of Haruto's martial arts, combined with Rio's tutelage in the Beltrum Royal Academy and his request to be formally taught Spirit Arts by the people of Spirit Folk Village, Rio can deal and take a beating, that is, assuming anyone can even hit him. Most of the time, Rio is forced to hold back, especially when Spirit Arts give him an explicit advantage. Just about the only character who can match him blow-for-blow is Aishia when she can read his movements like a book due to her Telepathy and being his effective Moveset Clone.
- Magic Knight: Rio doubles as a Master Swordsman (thanks to Haruto) and a master of the Spirit Arts due to his training with the Spirit Folk.
- Master of All: He can use all types of Spirit Arts, as well as being highly proficient in multiple forms of combat.
- No Good Deed Goes Unpunished: At the start of the series, he managed to save Princess Flora twice, only for himself to be accused of kidnapping the first time and committing Regicide the second time, both thanks to a misunderstanding. This causes him to become a fugitive.
- Paper-Thin Disguise: Subverted with his hair color disguise - the idea of dying one's hair isn't common in the Strahl Region, and even then, those who are aware of Rio's true identity note that he gives off a different impression depending on his hair color. The only one who sees through his disguise the first time without prior knowledge is Princess Flora Beltrum, although she isn't entirely sure due to the aforementioned rarity of hair dye.
- Pocket Protector: The bag of coins Celia gives him for his information regarding Flora's whereabouts Rio awakens to Haruto's Past-Life Memories ends up protecting him when he's immediately stabbed by an assassin after returning to the house he shares with three other men in the slums.
- Poor Communication Kills: In the Web Novel, Rio's hesitation in telling Miharu the truth about his feelings and his origins leads to the two of them being separated and the latter miserable. Averted in the Light Novel, but he has other problems.
- Rags to Riches: He goes from a street orphan to an Honorary Knight (a position which is equivalent to that of a count).
- Real Name as an Alias: After becoming a fugitive as Rio, he calls himself "Haruto" in locations where "Rio" is still wanted, such as the Strahl Region.
- Really Royalty Reveal: Rio is the grandson to incumbent Karasuki Emperor Homura and Empress Shizuku, but Downplayed when he cannot be recognized legitimately when his mother, Princess Ayame, was exiled from the Karasuki Kingdom before he was born. In any case, Rio doesn't think himself as one, though others in the know about his lineage believe, otherwise.
- The Reveal: Rio isn't Haruto's first time at Reincarnation - it's his second. In his first life, he was the Dragon King Ryuo. After the Divine-Demon War, the Wise God Lina (who partially reincarnated as Miharu) used her life force to create a ritual so he could recover his strength in another world (Earth). In exchange, both of them would lose their memories of their former lives.
- Revenge: Rio wishes to get revenge on Lucius for killing his mother and possibly his father. He eventually succeeds in Volume 14.
- Scapegoat:
- Charles Arbor brutally beats him during interrogation, trying to get Rio to confess that he kidnapped Princess Flora. This is because it was under Charles' watch that Flora was kidnapped in the first place, and he wanted to redeem himself by claiming he was involved with catching the suspect.
- When Stewart accidently knocks Flora off a cliff during an academy excursion, after Rio saves her and disappears, Duke Gustave Huguenot pins the blame on Rio rather than risk a civil conflict between the Beltrum houses, especially when the Hugenots and the Arbors are already looking to undermine the other.
- Self-Restraint:
- At the Beltram Royal Academy, Rio has to constantly avoid saying anything to anger his noble-ranked classmates, lest their bullying of him escalates. After escaping the Strahl Region, he still practices restraint in dealing with nobles, knowing they could turn him into a fugitive again.
- Discussed by the time he gets to the Yagumo Region: people whom Rio interacts with note this habit of his and try to get him to drop it, only for him to have trouble as he's been doing it for so long, it's become ingrained in his mannerisms.
- Spanner in the Works: He is one to Reiss Vulfe due to the fact that he constantly disrupts the latter's plans by unintentionally getting himself involved and foiling Reiss' schemes, such as rescuing Flora from Lucius and helping Christina evade a capture team that Charles Albor sends to find her.
- Split-Personality Merge: Played With - unlike most isekai settings and Reincarnate in Another World set-up, Rio in the Light Novel merges his personality with Haruto's, including the latter's Past-Life Memories, thus creating a new personality that harbors both individuals, though Rio is treated as the dominant of the two with morals being influenced from Haruto, due to the fact that this is still Rio's body.
- Stock Light-Novel Hero: Deconstructed - dying on Earth in a gruesome traffic accident, Amakawa Haruto's memories are awoken in the memories of Rio, a 7 year-old street urchin who has a cynical personality compared to his own. The two personalities would eventually reconcile, but Rio considers Haruto a separate person from who he currently is. Despite the knowledge of a university student and martial arts training, Rio wasn't born into a life of prestige in the Beltrum Kingdom, and has to work hard to become as strong as the typical isekai protagonist, even forced to learn the native language very slowly, which is met with a pompous aristocracy and classmates who derides his efforts simply for being a commoner. Rio only gets as far as he does by pure luck, since other summoned individuals and reincarnators end up either being enslaved, stuck as commoners or had gotten the flashy title of a "hero", yet are simultaneously a political hostage from those who summoned them - these heroes, some of whom have varying personalities, results in creating monsters.
- Strong and Skilled: As result of his vigorous training and experiencing various real-life battles, Rio acquires a great deal of battle experience, allowing him to contend with powerful fighters like Saga Gouki and Alfred Emal, who are veteran fighters. It is due to this trait that he is able to defeat all of the heroes he confrots, as all of them rely too much om the raw power of their respective Divine Weapons.
- Talking Is a Free Action: Right before he's attacked a second time by an assassin, time appears to freeze while Aishia shows up and awakens Rio's magical abilities, along with some of his martial art techniques learned as Haruto. He uses both to knock the assassin out.
- That Man Is Dead: How Rio treats his former life - while his current personality may be influenced by a mix of Haruto's Past-Life Memories, morals and values, the latter is ultimately an entirely different person. Subverted when Rio comes to acknowledge himself as both Rio and Amakawa Haruto after rescuing Miharu from Takahisa.
- Thou Shall Not Kill: Zigzagged - aside from monsters, which are fair game, Rio makes it a point to not kill anyone, which makes it harder when he's trying to rescue Celia later on from an Arranged Marriage she doesn't want to go through with. However, he starts to avert this after a group of slavers take people who can only speak Japanese, which isn't a native language in the new world, along with a smartphone, which also shouldn't exist. Rio wastes no time brutally killing them.
- Unperson: After tapping his power as a transcendent, Rio broke one of the rules that was set by the God of the World. This caused him to be forgotten by everyone that knew him personally. Fortunately, only "Rio" was affected by it not "Haruto Amakawa", so his friends can still remember him in a way as long as they don't associate those memories to "Rio".
- Vengeance Feels Empty: After killing Lucius, he doesn't gain any satisfaction and notes that it had to be done, lest Rio is unable to put the past behind him.
- Unwanted Harem: Many of the women he spends time with show interest in him romantically. Most don't act on it and a few imply that they want to be "more than friends" with Rio. Unfortunately, due to being an Insecure Love Interest and Oblivious to Love, he cannot reciprocate despite their own wishes.
- Sayo outright confesses to him before he leaves the Yagumo Region, but he gently turns her down due to the fact that he is able to begin his Revenge quest, thus he doesn't want to drag her into his troubles, despite her own wishes to go with him.
- Rio generally ignores Princess Charlotte Galarc's seductions as he's convinced that she is merely The Tease.
- He has Will They or Won't They? with several other girls, yet his insecurity prevents him from moving forward on the belief he's unworthy of love due to his morals as Haruto clashing with his quest for Revenge against Lucius.
- What the Hell, Hero?: Sumeragi Satsuki calls him out for giving up on his relationship with Miharu too quickly, noting that his decision will just make both of them miserable. She even duels him just to get her point across. Interestingly, her aforementioned concern turns out to be true in the Web Novel.
- Wrong Context Magic: Rio is unable to use the same magic that most people in the Strahl Region can. Instead, due to having a spirit contracted to him, he uses Spirit Arts, which can mimic the effects of some spells taught in the Strahl Region, but functions somewhat differently.
Endo Suzune / Latifa
Voiced by: Tomori Kusunoki (Japanese), Julia Gu (English)
Click here to see Endo Suzune
A fox beastkin slave trained by Duke Huguenot to be an assassin, Latifa is the reincarnation of Endo Suzune, a 9 year-old gradeschooler who was killed in the same bus crash as Haruto. Due to her young age, when Rio meets Latifa, she is emotionally unstable and latches onto him for support.
- Adaptational Backstory Change: In the Web Novel, Latifa is a Child by Rape from another beastkin slave and Duke Hugenot, making her Gustave's bastard daughter and Stewart's half-sister. The Light Novel and Manga alludes to this relationship from the Web Novel with Latifa when she was a slave to the Hugenots, addressing Stewart as "big brother", but the narrative makes it vague as to whether her origins from the Web Novel are retained. Meanwhile, the Animated Adaptation assumes she's a randomly enslaved beastkin by the Huguenots under the effects of a Slave Collar, which its master can activate to inflict immense pain on her to make her submissive.
- Assassin Outclassin': Duke Huguenot forces her to chase after Rio when he leaves Beltrum and kill him. Not only does this fail, Rio frees her from her Slave Collar.
- Because You Were Nice to Me: Suzune and Latifa become respectively attracted to Haruto and Rio after the former helped her when she missed a bus top and frees the latter from slavery.
- Big Brother Attraction: Latifa loves Rio as both a surrogate sibling and a girl, and the only reason she hasn't pursued a romance with him yet is due to her wanting to solve Rio's regrets from his previous life first.
- Big Brother Worship: She's so attached to Rio, Latifa refers to him as "big brother".
- Broken Bird: She was one due to being enslaved by Duke Huguenot, though she manages to regain her optimism after Rio saves her.
- Chekhov's Gun: Rio starts to suspect she may been a reincarnator from Japan like he is when she mentions the city of Tokyo while having a nightmare and calling a dish he makes "spaghetti", which does not exist in the new world. Not only does she come from Japan, but she was also on the same bus that he died in.
- Could Say It, But...: When Miharu asks Latifa who Rio really is, Latifa does not reveal anything as she is asked to keep his identity a secret. Her solution? Tell the recipient how she previously died on Earth, giving the former the final piece of the puzzle on knowing Rio's former life through a Dream Sequence.
- Defeat Means Friendship: Justified; she only attacks Rio because of orders from Duke Huguenot via a slave collar. Once Rio defeats her and removes it, Latifa follows him around as she has no where to go.
- Foil: To Sendou Aki - while Latifa isn't related to Rio by blood, he starts to consider her part of his surrogate family after he liberates her, and she quickly becomes emotionally attached to him. In contrast, Aki, who is Haruto's biological half-sister, is consumed by her hatred for him that any mention of his name causes her to be enraged due to a misplaced understanding on her part while growing up on Earth.
- De-power: Zigzagged in the Anime - Latifa seems to have lost or forgotten most of her fighting abilities after being defeated by Rio. When a black wyvern shows up outside of Spirit Folk Village, she's unable to do much beyond dodging its attacks, long enough for Rio to arrive and defeat it. Justified in that her assassination skills wouldn't be of much use against a flying creature out in the open and having been freed from the Huguenot's control, Lafita wants to be Brought Down to Normal and live a quiet life.
- Empathy Doll Shot: In the first scene of the Animated Adaptation, Suzune is on the same bus as Haruto. Upon crahsing through a train crossing gate, the bus is subsequently smashed by an oncoming train; the beret she had been wearing is shown in the debris field all dirtied and torn.
- Happiness in Slavery: Averted; after Rio frees her, she ends up following him because she doesn't know a life outside of being an assassin and wouldn't voluntarily go back to her former master. Rio doesn't want her to face an uncertain future on her own, thus allows her to tag along until they can find a beastfolk village willing to take her in and raise her.
- Living Emotional Crutch: For a while, Rio is this to her, but Latifa grows out of it thanks to her time spent in the Spirit Folk Village, though she remains clingly because of her Big Brother Attraction.
- Long-Lost Relative: Ursula, the elder of Spirit Folk Village, turns out to be her grandmother.
- Made a Slave: She was enslaved by Duke Huguenot, who used her as his personal assassin.
- Real Name as an Alias: After she returns to the Strahl Region with Rio, she starts using her Japanese name "Suzune" as an alias to avoid having her real identity discovered by Duke Hugenot.
- Paper-Thin Disguise: Subverted; despite using a magic artifact to hide her demi-human features, she is able to avoid having her true identity discovered due to the fact that it has been several years since Duke Hugenot saw her. Now that she's grown up, he's forgotten about her, with Gustave unlikely going to suspect that one of his former slaves is alive under an alias.
- Reincarnation Romance: One-sided; in her past life, Suzune had a Precocious Crush on Haruto.
- Spanner in the Works: Latifa is forbidden by Rio from telling Miharu that he was Haruto to prevent confusion, but he didn't say that she could not tell how she died. Thanks to this fact, Miharu deduces that Haruto and Rio are the same person thru a Dream Sequence from Aishia by recalling Latifa stating how she originally met Haruto on Earth and how they died in an accident.
Minamoto Rikka / Liselotte Cretia
Voiced by: Nao Tōyama
Click here to see Minamoto Rikka
The governess of the trade city of Amande in the Galarc Kingdom, Liselotte Cretia is the only daughter of Duke Cretia. She's also a reincarnator by the name of Minamoto Rikka, a 16 year-old who died as a high school student in the same bus accident as Haruto and Suzune.
- Arranged Marriage: Defied; Liselotte didn't want to deal with suitors and get stuck in this trope, which is why she made a bet with her father when she was eight that if she graduates from the academy before she turns 12 years-old, she gets to be exempt from any. It takes her 2.5 years to do so.
- Birds of a Feather: The reason why Liselotte hits it off so well with Rio is because they share similar circumstances in both being Japanese people reincarnated into a different world. Taken further when Rikka, like Suzune, knew of Haruto from her past life and kept taking the same bus route as him because she was attracted to him.
- Defiant Captive: She was not amused at being held prisoner after she was kidnapped by Erica and is busying herself by gathering information from her captors while she's held in the Holy Democratic Republic of Erica and possibly escape, if given the opportunity.
- First-Person Smartass: She has a lot of things that she wants to comment on, especially in regards to her dislike of Hiroaki's personality which she usually keeps hidden under her Proper Lady act. Stressful situations like being under attack can cause her thoughts to leak out.
- Honest Corporate Executive: She is the president of the "Ricca Guild", a trading company that specializes in providing various commodities, including some Japanese items which she created with her Past-Life Memories from Earth.
- King Incognito: When she first meets Rio, she's disguised as a Ricca Guild employee named "Lotte".
- Lonely Rich Kid: According to her parents, while she has many people who admire her, her status and workload meant that she was unable to make many friends who were close in age to her, which is why they are happy when Rio and Miharu start interacting with her, as she asks the two to remain her friends.
- The Ojou: Born into a life of nobility and prestige, Liselotte has practically everything given to her, yet she remains Spoiled Sweet, but is Silk Hiding Steel when it comes to dealing with veteran merchants or prominent nobles competing with her and the Ricca Guild.
- Put on a Bus: In the Anime, Liselotte appears briefly in the fourth episode, selling some provisions to Rio, and another as a cameo during Celia's wedding. Those who have only watched the show will only only know it's her because one of her employees mentions her by name. Justified when Rio is only passing through Amande and doesn't have any deep connections that would bring him back like the later villages he visits.
- Reasonable Authority Figure: Unlike Beltrum nobles, Liselotte doesn't play favorites based on class. When Alphonse and Stewart get into an altercation with Rio, she recognizes that they're trying to abuse their position to get away with harming him, and has them suffer the consequences instead.
- Self-Made Man: Played With; while Liselotte is the daughter of a duke, her management of Amande and creation of the Ricca Guild were a result of her own efforts, with it being stated that her competence in management exceeds most Galarc nobles.
- Trust Password: A lot of the Ricca Guild's products are intentionally created by Liselotte based on Earth products (pasta, for example) in hopes that she could send a message to other reincarnators like her. Rio, for his part, notices this early when he enters Amande for the first time, but doesn't approach Liselotte about it until later due to his own wariness and priority getting to the Yagumo Region. This backfires on Liselotte when Erika, the sixth hero and someone who wants to see the new world burn, spots it.
- Young and in Charge: Despite only being a teenager, Liselotte was entrusted by her father to manage the trade city of Amande.
Allies
Celia Claire
Voiced by: Akane Fujita (Japanese), Madeline Dorroh (English)
A professor in the Beltrum Royal Academy who Rio first meets in the slums while she is helping in the efforts to find Princess Flora, Celia Claire is a 12 year-old genius researcher and a sweet girl who doesn't discriminate other people based on status or race. She befriends Rio during his five-year stay at the academy, spending a lot of time having tea parties with him in their free time.
- A-Cup Angst: Downplayed, but she does wish she grows taller a bit more.
- Alliterative Name: Celia Claire.
- Arranged Marriage: She is forced to marry Charles so her father Earl Roland Claire can be exonerated from House Arbor, who suspects that he's assisting House Hugenot and the Restorationists. The arrangement isn't what she wants, thus Rio decides to take her away after she gives him permission to do so.
- Badass Adorable: She is notable for her looks and is known as a genius in magic. With that said, she never gets a lot of chances to show off her skill in Magic with Rio around. She does get her chance in Volume 19, showing off just how skilled she was in magic, and even went as far as to cast Celestial (Transcedental) Magic Durandal, which obliterated half of the Hero Killer Draugul's body. She also later learned how to cast Magic without a chant after Sora showed her that it was possible.
- Belated Love Epiphany: She only realizes that she likes Rio after he leaves the academy. Celia laments on it again the night before her wedding of what could have happened had she realized it much earlier.
- Character Name Alias: After she Rio saves her from her forced engagement, she hides her identity by going under the name "Cecilia".
- Childhood Friends:
- She and her old classmate Aria are this.
- Similarly, Celia and Rio are one, though she herself doesn't realize it until Rio points it out to her more than ten years later.
- Child Prodigy: She skipped grades and graduated early, becoming a lecturer at the Beltrum Royal Academy at the age of twelve.
- Clingy Jealous Girl: She dislikes Rio behaving intimately with other women, such as allowing Aishia to sleep in his bed, though she eventually grew out of it. Though she would still like to cling to Rio if given the chance.
- Dye or Die: In order to hide her identity, Celia changes her hair color from her natural silver to blond, with the assistance of Rio's magic artifact.
- Height Angst: Celia is disappointed that her height hasn't changed at all while all her younger students are taller than her.
- Mystical White Hair: She is noted to have unusual silver hair, which is speculated to be hinting at her distant high-elven lineage. Alternatively, this also hints at her connection to one of Wise God Lina's homunculus disciples, as Sora notes.
- The Napoleon: Rio likes to tease her about this from time to time. She never takes it well whenever he does.
- Older Than They Look: At age twelve, Celia is just as short as her 7 year-old students; when she's 17 years-old, she could pass for a middle schooler.
- Only Friend: She is the only person who ever bothered to befriend Rio during his academy days.
- Proper Lady: Rio picking up his knowledge and skill with brewing tea (aside from what he already knows from his past life) comes from Celia due to their constant tea parties. She also has a hand in his current gentlemanly persona, as a result of his constant interactions with her.
- Sensei-chan: Averted; Celia looks as young as her students, but she's a mature Reasonable Authority Figure, though she does have some childish moments in private with Rio.
- Skilled, but Naive: Celia's a skilled magician, but as she points out, she's a researcher, not a warrior, and lacks combat experience.
- Squishy Wizard: While she is stated to be a incredible skilled sorceress, she stated that her physical abilities aren't her strong suit. That is until she gained access to a number of high level spell formulae, one of is a spell that turns her into a skilled warrior, and another is a physical body enhancement spell normally only accessible by using ancient enchanted swords.
Ayase Miharu
Voiced by: Sayaka Harada (Japanese), Sarah Anne Williams (English)
The Childhood Friend and Love Interest of Rio's previous life as Haruto, Ayase Miharu went missing shortly after her entrance ceremony in high school.
- Childhood Friend Romance: With Haruto, and her inner monologue shows that she still has feelings for him, which is why she's reluctant to start a relationship with anyone else, including Rio (who she doesn't know is Haruto).
- Cool Big Sis: She is one for Aki, who loves her like an actual sister. Deconstructed in regards to their relationship with Haruto - since Aki hates Haruto, Miharu hasn't been able to talk to her about how they really felt about him. This only leads to Aki's hatred of him intensifying and turning complicated when Rio reveals that he is Haruto's Reincarnation.
- Damsel in Distress: She's captured by slave traders shortly after being transported into the other world.
- Foreshadowing: Unlike the companions of the six heroes who were transferred alongside them in their vicinity, Miharu was far removed from her friends and was instead brought to a place close to Rio's location. Since Miharu is the Reincarnation of Wise God Lina and Aishia is Lina's Soul Fragment, the other six Wise Gods didn't want her to be near the heroes as Lina is deemed a traitor by the six gods and Aishia would have naturally seeked Miharu out.
- The Reveal: Miharu is the human Reincarnation of Wise God Lina; together with Aishia, who is Lina's Soul Fragment, the two are basically one and the same. This explains why Miharu has a natural telepathic communication with Aishia, share similar physical features and a facial resemblance with her, as well as Miharu's high affinity with Spirit Arts, despite coming from Earth.
- Satellite Love Interest: Downplayed; her relationship with Haruto/Rio comprises most of her characterization, but she does have interactions with the Sendou family, Aishia, and Celia to color her. Averted for the Light Novel as her place in the narrative is expanded and she takes a more proactive role in getting closer to Rio. Volume 21 makes her more important to the story as she turns out to be a reincarnated God in Human Form Lina.
- Single-Target Sexuality: Despite her being a Dude Magnet, she only harbors feelings for her childhood friend Amakawa Haruto. While she does become partially conscious of Rio, it is only when she starts to suspect that he is Haruto that her feelings become more romantic in nature.
- Secret Secret-Keeper: Has known for a while that Rio is Amakawa Haruto due to Aishia sharing Rio's memories in a dream.
- Supreme Chef: Miharu learned to cook from her mother; she eventually takes over cooking duties from Rio during the time they live in the stone house as a form of gratitude to him.
- Switch to English: Tries to use Japanese, then English after being summoned and surrounded by slavers. Unfortunately, it doesn't help her.
- Unresolved Sexual Tension: She and Rio end up dancing around their feelings after Miharu discovers that he is Haruto due to the fact that he is a Insecure Love Interest and believes she is only in love with him because he is Haruto's reincarnation, as he states he cannot become Amakawa Haruto anymore. However, Miharu reasons that she is in love with him because she considers Rio both her Childhood Friend and his own person. The two finally manage to settle their feelings after Rio saves her from Takahisa and later acknowledges himself as both Rio and Haruto.
- Walking Spoiler: Everything about the scope of Seirei Gensouki changes when it turns out that she and a few others are caught in a summoning and sent to the same world where Haruto has been reincarnated to as Rio nearly ten years after his Reincarnation.
- Yamato Nadeshiko: Of all of Rio's Love Interests, Miharu fits this the best because of her beauty, calm and gentle personality, as well as her homemaking skills.
Aishia
Voiced by: Yuki Kuwahara (Japanese), Morgan Garrett (English)
Rio's contracted spirit, Aishia is an upper high-class humanoid spirit with an affinity for all the elements. Lying dormant inside Rio for nine years after Haruto reincarnated in the new world, Aishia physically manifests shortly after Rio returns to the Strahl Region.
- Adaptational Early Appearance: In the Web Novel, Aishia awakens after Rio kidnaps Celia from her wedding, while the Light Novel does it after Rio rescues Miharu in the Strahl Region. Meanwhile, the Animated Adaptation has Aishia appear roughly a month earlier in Spirit Folk Village when Rio returns there after leaving the Yagumo Region.
- Energy Being: As a spirit, Aishia is a sentient manifestation of Mana. After a Naked First Impression, Aishia generates clothes for herself via Ode and Mana.
- Foreshadowing: The Spirit Folk are baffled about Aishia's robotic and expressionless attitude for a supposedly high-class spirit, not knowing that she's a newly-created spirit that was forced to be sealed inside Ryuo's Reincarnation immediately.
- Familiar: In practice, her contract with Rio makes her this; as she repeatedly insists, she will always be by Rio's side and belongs to him in a platonic, devoted manner, even clinging onto him occasionally.
- Innocent Fanservice Girl: She has zero compunction about being naked around Rio or sleeping next to him in his bed.
- Instant Expert: Justified; everything she knows comes directly from what Rio knows and has learned in his current and previous lives - martial arts, swordplay, Spirit Arts - due to their contract.
- Line-of-Sight Name: Rio comes up with her name when he has a brief memory stint of cherry blossom leaves from his past life. Ironically, Sara explains that "aishia" also means "spring" in their language.
- Moveset Clone: Justified as Rio's experiences and memories in this life and in Haruto's previous life are all shared with Aishia, alongside her ability to read what Rio is thinking. Effectively, Aishia is the only character who can match Rio in combat.
- Naked First Impression: When Aishia finally manifests in the world physically, Rio sees her for the first time in the flesh, sleeping naked next to him in his bed.
- Sealed in a Person-Shaped Can: She lies dormant inside Rio for the first few volumes of the Light Novel, though her presence is felt when Haruto reincarnated as Rio at the start of the story and she, before falling asleep, briefly teaches him Spirit Arts.
- Shipper on Deck:
- She shows Haruto's memories to Miharu in order to get the two of them closer to each other, since she knows Rio is trying to distance himself from the latter. Later makes sense when Aishia knows who both of them really are.
- Aishia also ships Celia with Rio, who asks her if she wants to marry Rio after the topic of engagements comes up.
- Sugar-and-Ice Personality: Aishia doesn't express her own emotions much, but she's surprisingly sharp when it comes to others and shows great care to people. Discussed when Aishia enters Spirit Folk Village - according to Dryas, it's unnatural for Aishia to lack expression when a spirit's personality should already be mature by the time they become high-class, especially a humanoid spirit. Unfortunately, Aishia is mentally akin to a mid-class spirit, unless her expressionless characteristics are, in fact, her actual personality. Volume 21 of the Light Novel shows that originally, her personality and memories are supposed to be an exact copy of Wise God Lina, but due to time constraints with the Reincarnation ritual, Lina wasn't able to copy everything about herself fully, thus hastily sealed her inside Ryuo before reincarnating him.
- Soul Fragment: Whereas Miharu is the human Reincarnation of Lina, Aishia is instead Lina's divine half, thus explaining the girls' close resemblance and having an exclusive telepathy with each other.
- Telepathy: She can communicate with other people this way via direct contact even while in spirit form. For those who she has a contract with, such as Rio, she's able to effectively communicate with him upwards to a kilometer away.
SPOILER CHARACTER
Due to the nature of the following character, spoilers are unmarked to avoid redundancy.
Sora
The Dragon King's Disciple
A disciple of the late Dragon King Ryuo, who was Amakawa Haruto's previous life, Sora was an orphaned human girl who was saved by Ryuo by becoming his Familiar some time before the Divine-Demon War. Extremely loyal to the Dragon King, when Rio summons her in Volume 21 of the light novel, her devotion to her previous master extends to his second Reincarnation that is Rio.
- Draconic Humanoid: As Ryuo's Familiar, Sora can no longer be considered human. While she still possesses a human's physical appearance, her spiritual body is that of a dragon. In her partially transformed state, Sora grows two curved horns on her head, a tail, and wings; when fully transformed, her skin can easily repel magic.
- Really 700 Years Old: One of the effects of becoming Ryuo's Familiar is it completely stops Sora from ever aging. This also extends to her mental age as even after reuniting with the Dragon King's current incarnation of Rio, she still thinks and acts as her physical age suggests. Having been alive centuries before the Divine-Demon War occurred, Sora is one of Rio's strongest allies, comparable to Aishia in strength.
- Sitcom Arch-Nemesis: With Aishia, though this a one-sided example. This mostly stems from the fact that Aishia is a fragment of the Wise God Lina who Sora thinks is a scheming woman that fooled her beloved master Ryuo, along with the fact that Aishia has Lina's memories. It's worth noting that she only has issue with Lina herself as she doesn't show the same level of antagonism to Celia, who resembles one of Lina's homunculus disciples.
- Tsundere: Aside from Rio and the Dragon King, this is how she normally acts - a combination of her being naturally shy when around new people and the fact that keeping everyone at arms length is her way of protecting herself from being hurt should said people forget her.
- Troubled Child: Sora's brash attitude when interacting with anyone who isn't Ryuo can, at least in part, be attributed to the loneliness she felt over her long, solitary life when the Dragon King left her behind to fight in the Divine-Demon War. Given the rules that restrict her actions, she is very reluctant about opening her heart to others as they would soon forget her anyway, or worse, that she would forget them, instead. This is why when it becomes clear that Celia can clearly remember her, Rio and Aishia, Sora quickly befriends Celia.
- Undying Loyalty: Fiercely loyal to the Dragon King, and has been waiting for his return for the past 1000 years, Sora remains steadfast in her belief that the Dragon King will always be the same regardless of his incarnation.
