The male lead, Kojou was an Ordinary High-School Student until an incident three months ago where inherited the powers of the world's most powerful vampire, The Fourth Progenitor. Despite this he tried to live a normal life for fear of using his powers. Despite his best intentions he kept getting involved in various supernatural affairs as more and more threats come to Itogami Island.
Chekhov's Gun: Believe it or not, his blood becomes crucial in "Fiesta for the Observers", as it allows Natsuki to recover her memories for a short time, enough to take Aya's memory-stealing grimoire away and rip off her Guardian.
Dude Magnet: If every vampire on Vatler's yacht lusting for him is any indication.
Crouching Moron, Hidden Badass: He isn't stupid enough to qualify as an Idiot Hero, but he's still laid back, lazy and usually lacking any drive outside of fights. He also happens to be one of the most powerful vampires in the world.
Daywalking Vampire: Sunlight doesn't appear to affect him. He does express some discomfort in his first episode, but that seems to be more of a standard human problem with heat rather than a weakness to sunlight.
Fangs Are Evil: You won't see them unless he's baring his teeth in anger or about to drink someone's blood, both of which are big "Uh Oh" signs.
"Freaky Friday" Flip: Wakes up in the body of Yuuma Tokoyogi in the "Labyrinth of the Blue Witch" arc after she kissed him the night before. He is thoroughly confused and spends most of the arc trying to find his own body, which he does after defeating Yuuma.
Have I Mentioned I Am Heterosexual Today?: Due to his obliviousness about people's feelings for him and him being on friendly terms with a Lord of the Warlord's Dominion, Asagi is convinced that he is into men.
I Don't Want to Ruin Our Friendship: In episode 18, an insecure Asagi asks why Kojou never seems interested in her body and offers a peek. His answer is basically that he's really tempted, but he doesn't want to do something Asagi would wind up hating him for, because she's very special to him.
Immortality: To the point where he can actually come back from the dead.
Good Thing You Can Heal: He suffers a number of injuries or maimings that would be fatal or otherwise permanent for anyone else.
Meaningful Name: "Akatsuki Kojou" roughly means "Daybreak Castle", alluding both to his status as a vampire and creature of the night, but also his status as a Progenitor and thus destined lord of his own domain.
Nice Guy: Genuinely wants to help others, and cares about his friends and family above all else.
Oblivious to Love: Downplayed, since he seems at least somewhat aware of the women around him's attraction to him.
Off with His Head!: Suffers a decapitation at the hands of Combat Deacon Eustach, though his regenerative powers allow him to get better.
One-Man Army: As a Progenitor, he's the equivalent of a global superpower.
Our Vampires Are Different: He can walk around in broad daylight, summon familiars, and seems to still be a living, breathing creature rather than The Undead. Further, his blood thirst is connected to sexual desire, and he can temporarily sate it by drinking his own blood rather than others, although this reduces his power and ability to use his familiars.
Person of Mass Destruction: He has a total of twelve Familiars (though he only unlocks them one by one). A single one of them can destroy an entire region of the city in a matter of minutes.
Red Baron: "Kaleid Blood". He inherited the title from Avrora Florestina, the previous Fourth Progenitor.
His blood craving can be sated with his own blood. In effect, it's equivalent and connected to sexual lust, and the more aroused he gets the harder it becomes to fight his urges. Yuuma and Sayaka push him to his limit in Episode 19 to the point that when he starts to feed on them, his voice is almost maddened with desire.
Appearance-wise, he is a very handsome Bishounen with no bestial or demonic transformations (that we know of) aside from Cute Little Fangs. Likewise, he has no weaknesses to holy relics or sunlight, nor a dependency on darkness or other repulsive things.
His powers require him to drink blood before unlocking them, but in general, he's very keen to avoid doing this on unwilling persons. While it's also possible that there could be other unpleasant sides to his abilities, Kojou still tries very, very hard to avoid using them on people unless he has no choice.
Takes a swing from Rudolf Eustache's gigantic axe in order to shield Yukina. The Combat Deacon then proceeds to grind his axe even further, decapitating him. Naturally, his regenerative powers allow him to survive that.
Takes the brunt of the Wiseman's assault, causing him to be turned into metal.
Theme Naming: Each of his Familiars so far have been named after stars in the Zodiac constellations.
Trauma-Induced Amnesia: Can't really explain how he became the Fourth Progenitor because his own memories of the incident are a scrambled mess, and cause him quite a bit of anguish whenever he tries to recall them.
Unskilled, but Strong: Kojou can't use a majority of his Familiars, is not particularly good at fighting (To the point where Yukina can kick his ass if he doesn't blast her with his Familiars) and generally doesn't have the mindset for combat. He compensates by having a ridiculous amount of raw power and an absurdly powerful Healing Factor. According to Yuuma, Kojou's mana supply saved her from sacrificing 100,000 people to fuel the ritual needed to break the Prison Barrier's defenses.
Vegetarian Vampire: He tries to be this at first, feeding only on his own blood to avoid biting people. It works, but has the sad side-effect of preventing his familiar from obeying him. As the series progress, girls gradually allow him to drink part of their blood so he can get control over his familiar.
Wild Card: Since Progenitor's are the biggest, baddest players on the world's stage, his very existence has the potential to wreak havoc with the global balance of power. Naturally, this makes him the center of a lot of unwanted attention.
The female lead and an Attack Mage of the Lion King Organization, Yukina was sent to observe Kojou and in the event that he proved himself hostile, assassinate him. This quickly goes out of the window as she develops feelings for him.
Badass in Distress: During the Nalakuvera incident she is kidnapped, along with Nagisa and Asagi, by Christoph Gardos' terrorist group. Not only does she escape by herself, but by the time Natsuki arrives to help her, she has already taken down two guards and even forced Gardos himself into retreat, cutting off one of his hands in the process.
Bathing Beauty: Frequently caught in situations where she barely has the chance to dry herself properly, thereby wetting her clothes and (involuntarily) showing off her smooth skin and trim figure to Kojou. Played straight when he stumbles into her while she was bathing in Episode 11, though he wasn't lying when he said that not only didn't he see her, he was actually looking at La Folia Rihavein.
Battle Couple: She and Kojou make a good team. Her Anti-Magic abilities let her get around pesky barriers and other abilities that he can't get past, and he can just smash everything else with brute force. Thus, she deals the final blow against Arc Villains just as often as he does.
Berserk Button: She doesn't like people peeking under her skirt. Or peeking altogether, for that matter.
Bodyguard Crush: Played With. She was originally sent to "observe" him and take him out if he turned out to be dangerous. When she finds that he's generally a good guy, she switches her "observation" rationale from assassination to protection, as it allows her to stick by his side. In episode 19, when Kojou is almost fatally wounded, she asks him to stick by her "forever" so that she can protect him.
Break the Cutie: Suffers this in Episode 3 when Kojou gets decapitated right in front of her by the Combat Deacon. She gets better when he regenerates.
By the Power of Grayskull!/Calling Your Attacks: "I, Sword Shaman of the High God, as a priestess of the Lion, beseech thee... Dawn light of exorcism, spirit wolf of snowy mist, grant me the divine might of thy steel, that I may smite a hundred evil spirits!"
Catch Phrase: "Don't worry, Sempai; I am your observer, after all!" (Angelic reassuring smile) & "No, I'm not angry at all, Sempai" (Angelic 'not' reassuring smile)
Child Soldier: She was adopted by the Lion's King Organization for the express purpose of being raised as a Sword Shaman.
Clingy Jealous Girl: She gets angry and begins speaking in a really condescending and insincere tone if Kojou mentions other girls or does anything inappropriate, even if it's accidental.
Interestingly enough, she's not as jealous when she hears that Sayaka offered her blood to him in episode 8. In fact, she was more worried that he may have forced himself onto her, but was relieved to find out that wasn't the case.
In episode 10, after Kojou and Yukina get dropped off on an abandoned island/research facility, he says that in the worst case scenario, they'd have to live there alone, and mentions that it'll really suck. She turns around and breaks a rather large branch off a nearby tree. When he asks if she's mad, she claims to be making a landmark for reference, while angrily shaking the branch thinking about his previous comment.
In episode 12, she's there when La Folia kisses Kojou, but she doesn't react to that. What she reacts to is learning that Asagi had also kissed Kojou back in episode 8.
In episode 19, she gets angry when Yuuma tricks Kojou into kissing her. When he defends himself by pointing out that it was a Forceful Kiss, she claims he's too "unguarded" and she's just displaying Anger Born of Worry.
In episode 22, after Kojou does a Big Damn Heroes for her, she says that she needs to keep more of an eye on him, because he keeps getting into trouble, and hooking up with all these unfamiliar women.
Clueless Dude Magnet: She is quite popular among the boys at school, to the point some of them came to beg her to become a cheerleader. Apparently, she never noticed.
Fish out of Water: When she first goes shopping with Kojou in episode 2, she's amazed at all the types of weapons they sell at the hardware store, such as golf clubs, pressure washers, and chainsaws. He has to correct her as to what their intended use is for. When she tries to comment that mixing two types of cleaners can be used to make explosives, he immediately stops her from saying any more.
Holy Hand Grenade: Played with. Her powers and staff are designed to cancel out all types of magic, not just the "bad" kinds. However, it's theorized that this is because magic in itself is unnatural and negating it is "returning the world to how it was meant to be".
Honey Trap: The Lion King organization actually sent her, along with Sayaka, to be Kojou's "mates", as Yaze is his real observer. She remains unaware of this, however.
Informed Attractiveness: It's not that Yukina isn't attractive. But, we're flat out told several times that she's absurdly gorgeous compared to other middle school girls in her class. This is despite the fact that she's actually got one of the most plain designs in this series' character roster. She doesn't have anything really special about her looks, whether it be a distinctive style of dress (like Natsuki), distinctive eye shape or color (like Kanon or La Folia), or distinctive hairstyle or shape (like Asagi or Sayaka). Even Nagisa, who is her classmate, has something special about her appearance. Compared to the other characters, there's nothing about Yukina that stands out—especially when Only Six Faces is taken into account.
In Love with the Mark: She thought that she was actually meant to assassinate Kojou, but his immortality and her crush on him quickly leaves that mission in the dust.
Insecure Love Interest: Due to her Clingy Jealous Girl tendencies, along with the large harem of women interested in Kojou, she's always suspicious of anything he does with another woman, even if he's completely innocent.
Keigo: She uses exclusively polite and formal Japanese in her everyday speech, which with her friendly and polite manners marks her out as a Yamato Nadeshiko in the making. She even prefers to refer to new friends (like La Folia) by their formal names even after they offer to allow her to use affectionate nicknames.
The Lancer: she is Kojou's most trusted companion and fighting partner.
Little Miss Badass: A waifish middle-schooler trained in magical combat and using one of the most powerful weapons in the setting.
Nice Girl: Bright, sweet, well-mannered and kind-hearted; every home should have one.
Parental Abandonment: She was sold to the Lion King organization as a baby by her biological parents.
Punched Across the Room: "Pulsation", which involves her applying both her hands to a target who are then hit with an extraordinary amount of force.
Reluctant Fanservice Girl: She really doesn't like being ogled or looked at with perverse desire. Except on certain special occasions when she gives Kojou permission.
Sacred First Kiss: With Kojou in Episode 12 (she does it hastily to prevent La Folia from getting it in her stead). She discusses it with her classmates in Episode 21 and stops just short of spilling the beans—which makes them explode with curiosity.
Sempai Kouhai: Kojou's kouhai, as well as Kirasaka's kouhai and former roommate at High God Forest.
Thousand-Yard Stare: She suffers one in episode 3 after Kojou takes a blow intended for her. She's splattered with his blood, then his body falls limp on her, and detaches from his head as she's holding it after Eustach grinds his axe some more into him. Her Big "NO!" scream right afterwards adds to the trauma she just witnessed. Fortunately for her he gets better.
Natsuki is an English teacher at Ayami Academy and she is also a powerful attack mage called "The Witch of The Void". She claims to be in her mid 20's in spite of her childish appearance. She is one of the few people who knows that Kojou is the Fourth Progenitor.
Animated Armor: The Golden Guardian, which is her familiar and the archrival of Aya's Le Ombre.
Astral Projection: She is able to project realistic copies of her own body, such as the Natsuki everyone knows and talks with in school; the real Natsuki resides in a maximum security magic prison in order to keep the seal on Aya Tokoyogi.
Badass Adorable: She has the appearance of a cute little girl dressed like like a Gothic Lolita. She also happens to be one of the most powerful mages in existence.
Barrier Maiden: She or rather her real body keeps the seal on the Demon Barrier Prison, which includes some of the most dangerous magic world criminals, such as Aya Tokoyogi. Only by fatally wounding Natsuki is Aya, along with the other inmates, able to escape her prison.
Natsuki: "My name is the Void. I am she who reduces broken vows to ash consumed by eternal flames. Tear off your yoke of black blood, and return whence you belong! Offer your sword to the blue maiden - the blessing of your honoured soul!"
Chain Pain: Can manifest countless chains out of thin air at will, often to restrain opponents or minimize the damage caused by ongoing fights.
Cute Witch: Although she insists on being in her twenties, somewhat subverting this trope.
Elegant Gothic Lolita: How she dresses normally, although she puts on the school uniform in Episode 13, catching Kojou and Yukina off-guard.
Impaled with Extreme Prejudice: Is on the receiving end in The Stinger of the "Labyrinth of the Blue Witch" arc, by Yuuma's guardian, revealed to be Aya's instead. She survives, but gets her memories stolen by Aya's Grimore 014, reverting her to a childish personality. She fully recovers by the end of the "Fiesta for the Observers" arc.
Jerkass Fašade: She tries to come off as colder than she really is, but the disguise is paper-thin.
Legal Jailbait: She's twenty-six years old, but looks like a child. However, aside from an occasional costume change or bathing scene, she's not very fetishized for this trope.
Little Miss Badass: She cooly and calmly defeats several opponents that even the main characters have trouble with. Most people aware of who she is are scared shitless of her.
Older than They Look: She is 26, yet looks like a grade-schooler. This is because her real body has been asleep for years in the Demon Prison Barrier in order to keep the seal on the criminals locked in there.
Reasonable Authority Figure: She doesn't actively get in the way of Kojou and Yukina's actions because she knows they're able to come out on top in the end.
Sailor Fuku: In episode 13, where she claims that it's a disguise to try and catch some of the molesters that have been plaguing the metros recently. Kojou is quick to reply that she looks better in it than her normal garbs.
Secret Keeper: One of the few people to know right from the beginning that Kojou is the Fourth Progenitor.
Split Personality: She has an absolutely hilarious backup personality by the name of Natsu-Kyun.
A childhood friend and classmate of Kojou, she is an expert programmer and works for the Manmade Island Management Corporation. She has a crush on Kojou. Despite knowing the island is deeply connected to supernatural powers and creatures, she has no idea that her friends are among them. She is nicknamed Cyber Empress.
Action Survivor: Protects a de-powered Natsuki during the "Fiesta for the Observers" arc.
Aren't You Going to Ravish Me?: To Kojou in episode 21. After waking up half-naked in his bed, she gets emotional and teary-eyed over the implication that Kojou might have done something to her while unconscious. An embarrassed Kojou assures her that nothing happened, and after he finally convinces her, she tells him, "You're useless".
Awesomeness by Analysis: In the span of a few hours she manages to not only analyse the Nalakuvera, but create a self-destruct command based on its use of sound commands.
Badass Bookworm: She's a very skilled hacker, and she's responsible for the destruction of all of the Nalakuveras, including the queen unit.
Cannot Spit It Out: Initially. Compared to most cases in fiction though, she is relatively quick to get better at it.
In episode 2, she sees Kojou walking with Himeragi outside of school and later questions him about it.
In episode 3, Natsuki-sensei tells him to report to teacher's office with the middle school transfer student that all the boys were going crazy over. When one of the female classmates angrily states that Kojou already has Asagi, he says that they're Just Friends. Asagi then rips up his world history report.
Foreshadowing: During the "Alchemist's Return" arc, she is fatally injured by Wiseman's blood and is left to die. While Nina Adelard took the necessary steps to keep her body safe from Wiseman's contamination, she herself recovered from her injuries in record time, with no recollection of the incident whatsoever. This is because she is the Priestess of Cain, and is thus tied to Itogami Island; as long as she remains on the island, she cannot die.
Heroic Sacrifice: She attempts one in Episode 24. Fortunately, the heroes save the day, making it unnecessary.
Immune to Fate/Immortality: As the Priestess of Cain, she cannot be killed by any means until she fulfills that destiny. It differs from Kojou's immortality in that events will simply align themselves in a way that results in her unconditional survival.
Downplayed in Episode 8; after years of Cannot Spit It Out, Kojou still believes they're Just Friends. So after the "Warlord" arc, she asks Kojou to get a close look at her earrings, and then plants a Forceful Kiss on him and says "Now you know". Kojou stunned by this; however, four episodes later, he starts to ask her about the kiss (in front of the other girls), and she backpedals about its meaning.
In Episode 24, Asagi has decided to make a Heroic Sacrifice to save as many people from the sinking Itogami Island as possible, and after begging Kojou to escape, she again brings up their kiss and starts to make a Dying Declaration of Love...but the phone cuts off before she can finish.
Male Gaze: Several characters comment on her figure, which we get plenty of close-up shots of.
Muggle Best Friend: To Kojou. She knows of the shiftier sides of the city and has been a Living Macguffin for an arc already, but she has no powers of her own besides her incredible tech skills. Subverted when we are told about her existence as the ""Priestess of Cain".
The Smart Girl: Is almost always the go-to person when Kojou needs a helping hand on the technical matters.
Science Hero: Despite being an ordinary human, she's the best hacker the protagonists can get.
Sexy Coat Flashing: Attempted, except using a school uniform rather than a coat. In an attempt to seduce Kojou, Asagi takes off her clothes in front of him, standing in a bra and panties. She waits for him to notice, but he refuses to turn around, to her disappointment.
Kojou's best friend and classmate. He knows that Kojou is the Fourth Progenitor even though he didn't tell him, and appears to have some connection with the Lion King Organization. He is an Esper who has the ability to manipulate special soundwaves, but needs certain drugs or enhancers to strengthen his abilities.
Big Bad Friend: Played with; he actually is a member of the Lion King Organization sent to observe the Fourth Progenitor, a fact Kojou is unaware of. However, since the Lion King isn't clearly defined as antagonistic so far, calling him "bad" is kind of a stretch.
A Friend in Need: It's implied that he doesn't quite agree with his superiors methods, as he's bent the rules more than once to help his friends from behind the scenes. also, see Shipper on Deck
Blow You Away: He can fly and control wind through the use of sound.
The Mole: He is Kojou's real Lion King observer, whereas Sayaka and Yukina are actually meant to be his "mates".
Mundane Utility: He can use his extreme hearing to map out an area and see what's going on everywhere in it, similarly to how bats can use sonar to detect their surroundings. This is useful for his position as Kojou's observer, allowing him to track Kojou anywhere in their school at once.
Non-Action Guy: Gloriously proven by Vatler, who takes him and his sound apparition out in a single magic blast.
Shipper on Deck: Actively encourages Asagi to confess her feelings to Kojou. as mentioned above, Lion King Orginzation are already trying set up Yukina and Sayaka as Kojou's "mates", which means that he's A). Locked out of the Loop, B). trying to set up another Honey Trap for his bosses, or C). actively working against his bosses' wishes. Only Time will tell
Super Senses: Specifically, he has extremely good ears and can actually use them combined with his powers to use sonar response like a bat.
Weaksauce Weakness: His manipulation of sound leaves him with very sensitive ears, so when Kojou accidentally shatters all the windows in their school while Yaze is using his Super Hearing, he winces from the pain and is left unable to use his powers for a good ten minutes.
Nagisa is Kojou's little sister who attends the same school as Yukina and is in the same class 3-C. She is also a close friend of Yuuma Tokoyogi and is good friends with Yukina Himeragi and Kanon Kanase. Her mother is Mimori Akatsuki.
Dark and Troubled Past: A train crash that she only barely survived four years ago caused by demons resulted in her Primal Fear of them and may also be related to Avrora possessing her.
Deus ex Machina: After Kojou is turned to metal, Nagisa appears and, demonstrating an ability she's never shown before, solves the problem, as she's possessed by Avrora and awakens the necessary plants a kiss on him, awakening a familiar that can undo the spell.
First Kiss: Jokingly notes that hers would have been with Yukina had the Pocky punishment gone just a little further. It gets taken by Kojou instead, although Avrora had taken control of her body in order to activate Sadalmelik-Albus.
First Name Basis: Strangely, with both Kojou and her mother. This is extremely unusual given how Japanese Pronouns work. She never adds a "-nii" to Kojou's name, or refers to her mother by anything other than her first name. Possible Foreshadowing alert...!
Foreshadowing: According to Asagi, the doctors that saved her after the above incident said that she would be stuck in a coma for the rest of her life. Shortly after, we find out that she may be possessed by an outside entity who may have been behind her unlikely recovery.
Genki Girl: She has hints of this, especially when she gets excited such as talking to Yukina.
Kawaiiko: Has a very sweet little sister personality.
Little Sister Heroine: Averted so far, although the reveal of Avrora possessing her may make her the centerpiece of a future arc.
Locked Out of the Loop: Justified by the fact that she might never mentally recover if she found out that her brother was one of the supernatural beings that she fears so much.
Motor Mouth: She tends to get overexcited and asks rapid-fire questions to others at times.
Muggle: She does not know about Kojou's powers or those of any other characters from their school. However, she is revealed to be possessed by a portion of Avrora, which subverts this.
OOC Is Serious Business: During the Nalakuvera arc, she suddenly snaps into a trance and starts speaking with an echo, hinting that she may be possessed; this is later proven when she trashes Vatler and warns him about his ambitions.
Primal Fear: If she sees a demon in their non-human form, she gets extremely scared and curls up in terror. This is caused by the demon-caused train crash that she only narrowly survived four years ago.
Anti-Villain: Even Kojou and Yukina admit that technically, he is in the right to accomplish his goal, that is, retrieving the right arm of a saint from the West European Church, which is being used as the core of Itogami Island. The problem is he is completely uncaring of all the people he has to kill to reach said goal.
The Coats Are Off: Ditches his cape in order to use his armour, Alcazava, to its full extent against Kojou.
Even Evil Has Standards: At the end of episode 3, after he decapitates Kojou, he leaves a shell-shocked Yukina alone and goes to find the right arm of the saint instead of finishing her off like he had intended to originally.
Futile Hand Reach: As he lays defeated, he reaches out to the Right Arm of the Saint before passing out.
Holy Hand Grenade: The Alcazava shines so brightly, it even slightly singes Kojou, forcing him to back off a bit.
Knight Templar: His motivation to retrieve the Right Arm of the Saint stems from the fact that it originally belonged to his religion, despite potentially causing Itogami Island to be destabilized at its core should the hand be removed from its pedestal.
The homunculus servant of Rudolf Eustach. Possesses the power to summon a Familiar called "Rhododßktylos".
Anti-Magic: Her Familiar has been adjusted with divine vibrations to nullify magic and cut through all kinds of barriers, effectively countering Yukina's spear. However, Kojou's newly awakened Regulus Aurum is able to weaken her vibrations, eventually succumbing to a combined attack by Yukina and Kojou.
Bilingual Bonus: "Rhododßktylos" is Greek for "rosy fingers", a word used to describe the goddess of dawn, Eos.
Bullet Catch: Her Powered Armor allows her to stop in mid air bullets from the automatons guarding the Right Arm of the Saint.
Catch Phrase: "Accept", whenever she is given an order and is about to execute it; and "Complete", whenever she finishes her current order.
Defeat Means Friendship After Eustach's defeat, she is placed under Natsuki's command during the time she'd otherwise have to spend in jail.
Emotionless Girl: Because she is a homunculus, she expresses little emotion and has no particular likes or dislikes.
Energy Absorption: Her Familiar is capable of draining an opponent's powers, which is put to good use in the "Fiesta for the Observers" arc, where she defeats one of the Barrier Prison inmates.
During the Nalakuvera arc, she hastes to the rescue of Yukina, Asagi and Nagisa, but takes too long to summon her Familiar, allowing Christoph Gardos to shoot her before she can even finish her summon command.
In the "Fiesta of Observers" arc, she absolutely owns Kiliga Gilika, only to be defeated by Gigliora Ghirardi soon after.
Your Days Are Numbered: Initially, she was slowly dying from using Rhododactylos and only had about a month to live. After Kojou brings the Familiar under control, her lifespan is normalized.
Characters introduced in "Messenger of the War King"
Voiced by: Ikumi Hayama
A friend of Yukina who was ordered by the Lion King Organization to take charge of multinational magical crimes in the Foreign Affairs Division.
Absurdly Sharp Blade: By reversing the barrier of her sword to make the sword itself invulnerable, she can make it slice through anything like butter with a warm knife.
Action Girl: Comes with being trained by the Lion King Organization and fighting supernatural beings since she was small.
All Amazons Want Hercules: Invoked during the scene when she confesses that although she's grown used to playing Hercules for other girls, when Kojou does it for her, she finds it a welcome change.
Because You Were Nice to Me: She gradually starts developing some feelings for Kojou due to his apologies for perverted acts, the fact that he seems to admire Yukina for more than just her looks, and because he doesn't consider her height a bad thing; something she was always insecure about.
BFS: Her sword, Koukarin, is almost as big as she is. And she is big. When Aya Tokoyogi's Anti-Magic drains the sword of its magical energy, she actually cannot lift it.
Boobs of Steel: When she meekly asks Kojou about her insecurities concerning her unusual height, he mistakes the matter to be about her breasts (which he had just accidentally copped a feel of) and reassuringly tells her "Don't worry; you know what they say, "guys like them big."" And yes, she is as powerful as she is stacked.
Bowties Are Cool: Part of her standard outfit, she wears a feminine tie around her collar.
Bridal Carry: Kojou does this to her when they have to jump from subfloat to subfloat. While she tries to get him to let go at first, it later turns out that she was always the one to carry the other girls at High God Forest because of her height and actually appreciated that he did it.
By the Power of Grayskull!/Calling Your Attacks: "I, War Dancer of the High God, as a dancer of the Lion, beseech thee... Enkuu of the aurora, Kirin of radiant light, who doth rule thunder and the heavens, come clad in raging fire, to pierce Hell's monstruous demons !"
Defrosting Ice Queen: Toward Kojou. Initially, she hates him for reasons such as jealousy for his relationship with Yukina, being a vampire, and supposedly being a Handsome Lech. However, she begins defrosting when he refers to her childhood picture as "cute" (apparently the first to have done so) and then doing a Bridal Carry to bring her aboard an enemy ship.
Tsundere: At first she is extremely dere for Yukina and extremely tsun for Kojou. After getting to know Kojou, she goes completely mush for him too, though still responds with tsun if he fails to pick up the obvious romantic signals she's sending him. La Folia later takes joy in revealing that Kojou is listed under Sayaka's favorite contacts on her phone.
A pure-blood / direct descendant vampire born from the lineage of the First Progenitor, the Lost Warlord. He knows Avrora Florestina, the original Fourth Progenitor, and implies that they were in love.
The Ageless: As a vampire, he has lived far longer than most of the cast, yet still looks in his twenties.
Ambiguously Evil: Vatler is so old and has seen so many things that he doesn't really think in a way comprehensible by mortals. This makes his actual morality impossible to read.
Anti-Hero: Type 4 or 5. He does protect Itogami Island, but only from threats that he finds entertaining and he has no qualms using Familiars that literally eat his opponents alive.
Ax-Crazy: Once he gets going, he goes absolutely batshit crazy.
Badass: Kirasaka claims that Vatler is the closest thing in power to an actual Progenitor that isn't another Progenitor. Vatler himself also fancies that he can beat the seemingly invincible Nalakuvera, a "weapon of the Gods" that can supposedly defeat a Progenitor.
Ambadassador: He becomes the Ambassador in the Embassy of the Warlord's Dominion after the Nalakuvera incident.
Badass Gay: By extension of being attracted to Kojou because he inherited the blood of Avrora Florestina.
Cool Ship: The Oceanus Grave and, after it is sunk during the Nalakuvera arc, the Oceanus Grave II.
Curb-Stomp Battle: Creams Yaze with a single blast of magic, and later dispatches two Prison Barrier inmates with little effort (although Broodt Dumblegraff forces him to fight seriously). Is on the receiving end when a possessed Nagisa trashes him with one of Avrora's Familiars, Alrescha Glacies.
The Dreaded: The Meyer Sisters nearly shit themselves in terror when he encounters them.
Fiction 500: Implied. Not only can he afford two extremely luxurious yachts without issue, he also has various princesses from countries close to The Warlord's Dominion as call girls.
Fusion Dance: Has the ability to fuse some of his familiars together.
Informed Ability: He's implied to be so ridiculously powerful that no character introduced so far is a match for him, which is why he's kept on the sidelines. Once he finally takes center stage in the Labyrinth of the Blue Witch arc, everyone is scared shitless of him, and we finally get to see why; He absolutely creams one of the extremely powerful Prison Barrier escapees so hard that Kojou has to stop him from having his Familiar eat her alive and immediately follows it by defeating a Dragon Slayer, who has a massive advantage against Vatler because of his Dragon familiars.
In-Series Nickname: Natsuki refers to him as "Snake-Charmer" based on his multitude of snake-like Dragon familiars.
Single-Target Sexuality: He was in love with Avrora, the previous Fourth Progenitor. Since Kojou has inherited the position by consuming her, he has reported his affection on him. Much to Kojou's dismay, he doesn't appear to care if the new Fourth Progenitor is a man.
Beard of Evil: A goatee that blends in with his mane when transforming into a therianthrope.
Beneath the Mask: When first introduced, he appears to be a rather composed, Affably Evil villain. This fašade eventually crumbles as his Blood Knight tendencies become more apparent over the course of the arc.
Hoist by His Own Petard: Kidnaps Asagi so that she can analyse and figure out the sound commands for the Nalakuvera's so that he can have a squad of virtually indestructible mechas on his side. Instead she manages to homebrew a command that causes the Nalakuveras to self-destruct.
Knife Nut: His weapon of choice when fighting Yukina on board of Vatler's ship.
An ancient weapons system unearthed by the Black Death Emperor Faction under Christoph Gardos's command.
Adaptive Ability: The reason why it is so powerful in the first place. It will instantly evolve and counteract according to the attacks used against it. This is first shown when Kirasaka chops one of it's legs off, only for the Nalakuvera to instantly deploy a repulsive field barrier to block her next attack not even 5 seconds later. As the fight with it drags on, it actually gains an adaptational immunity to Regulus Aurum.
Beam Spam: Its main weapon, which fires powerful lasers.
Healing Factor: Another reason why it is so terrifying. Through the use of Elemental Conversion, the Nalakuvera can regenerate from being completely demolished in seconds.
Hoist by His Own Petard: Asagi manages to analyse its sound command system and create a self-destruct command based on those sounds, which Himeragi broadcasts to all of the units by throwing Asagi's cell phone into the Queen.
Humongous Mecha: Guesstimating based on it's relative size to human-sized characters, it's a little over 10 meters tall and 20 across.
Perpetual-Motion Monster: It has no need for any kind of energy source, is commanded entirely through a series of sound commands, can regenerate from debilitating damage in seconds and adapts to it's opponent's attacks to the point where it eventually becomes immune to it entirely. The only reason it didn't become completely unbeatable was that it was defeated by Asagi's homebrewed sound command before it could evolve out of control.
Schizo Tech: It's far more advanced than any modern weaponry, yet is supposedly several thousand years old.
Spider Tank: Pretty much describes its appearance to a T.
Taken for Granite: Thanks to Asagi's analysis and implementation of a self-destruct command, all of the units, including the Queen, are disintegrated after turning into stone.
We Have Reserves: After Kojou and Kirasaka manages to temporarily down the Nalakuvera, it turns out that there were another batch of units hiding on the Oceanus Grave, which immediately join the fight.
Badass Princess: She is a bastard of Aldegyr's royal family; specifically a child of La Folia's grandfather and Kensei Kanase's sister.
Because You Were Nice to Me: Kojou pays her a compliment over her dutiful care of the kittens inside the monastery, which prompts a grateful smile and thank you. It seems that this the first thing that sparks her feelings for him, because it's specifically wounding him in combat that causes her to Freak Out. After Kojou helps rescue her at the end of the arc, that seems to cement her interest in him, enough for her to directly tell him she wants to know what kind of panties he likes.
Break the Cutie: Big things happen during the "Amphisbaena" arc, none of which are welcome to the poor girl.
Brought Down to Normal: Is brought out of her Angel Faux state through the use of Himeragi's Schneesturm Wolf´n after Kojou removes her dimensional barrier with the help of his newly acquired Familiar, Al-Maisan Mercury.
Covert Pervert: In episode 20, while she, Nagisa and Yukina are in a lingerie store and Kojou waits outside, she urges Kojou to come in with them so she can learn his taste in underwear.
Freak Out: Her seemingly killing Kojou causes her to go absolutely berserk before she freezes herself solid to stop her own rampage.
Good Wings, Evil Wings: Three sets of angelic wings once she reaches Level 7, however they are definitely not good, which is made evident by the evil-looking eyes that manifest on them. Once her dimensional barrier is shattered, they become blood-red and covered in Tron Lines.
Heroic Bastard: An illegitimate daughter of the father of the King of Aldegyr, technically making her La Folia's aunt.
Innocent Fanservice Girl: In episode 13, when Kojou is warped into the bathroom she's taking a bath in because of the warp-space phenomenon happening all over Itogami Island. She calmly asks who it is before telling him that she and Astarte are using the bath first.
My Kung-Fu Is Stronger Than Yours: Yukina's Divine Vibrations are far inferior to the ones she generates, as while Yukina is merely a human generating those Vibrations, Kanon is an Angel Faux, close to the realm of the actual biblical God, and therefore radiates far more powerful Divine Vibrations.
No Sell: As an artificial Angel, she is of a higher dimension than most other beings, making her completely immune to their attacks. This causes Kojou's familiars to fly right through her without any effect. Kojou's Al-Maisan Mercury can nullify this by eating the dimensional border.
Our Angels Are Different: She is an Angel Faux, an artificial angel who gains power by eating the spirit of other Angel Faux.
Person of Mass Destruction: Kensei compares her to a natural disaster, and it's implied that she can grow even stronger if she devours the spirit of more Angel Faux.
Proper Tights with a Skirt: She's the only girl we've rocking this look so far. Combined with long sleeves underneath the fuku's short one's, she has the most "modest" costume of all the female regulars.
Woobie, Destroyer of Worlds: She has been modified by her adoptive father / uncle in order to reach the state of ultimate lifeform, and is forced to murder and devour other similar artificial angels. Worst of all, she nearly kills Kojou, her big brother figure. Needless to say, her rampage at the arc's climax is justified.
La Folia Rivahein
La Folia Rihavein
Voiced by: Saori Onishi
The eldest princess of the Kingdom of Aldegyr, La Folia is seen to a quite cheerful young woman and quite friendly. Even though she just met Kojou, she seems to care for him as much as Yukina does for him.
Almost Kiss: In the beginning of Episode 12 with an unconscious Kojou, only to be interrupted by Himeragi. She makes good on it and kisses him in front of all the other girls at the end of the same episode.
Badass Princess: She came to rescue a distant relative, and saves the asses of our heroes more than once.
Bayonet Ya: Her magic gun also has a magical bayonet blade jutting out that's bigger than the gun itself.
Bling of War: Her Curse Gun is extremely ornate with golden details.
Guile Heroine: When trapped in the ice with Yukina and Kojou, La Folia theorizes that the only way to heal the latter's wound is to sexually stimulate him and offer blood to awaken a familiar. Without further discussion, she immediately strips half-naked, straddles him, and prepares to kiss him but calls it "embarrassing". Yukina (partly acting on jealousy) stops her and offers herself instead, when La Folia backs down easily and smirks, she asks if this was La Folia's plan along. She gives an ambiguous answer. When Yukina later falls asleep after the blood-drinking, La Folia is quick to offer herself again and it just so happens that the familiar that awakens needs two people's blood to work.
The Gunslinger: Carries a "Curse Gun", which fires incredibly powerful magical bullets.
Hotter and Sexier: She looks almost exactly like Kanase, except with a few extra inches of generous curves.
Vapor Wear: She doesn't wear a bra, at any rate. Guesses are still out as to if this includes her Going Commando as well.
What Beautiful Eyes: Her eyes are drawn in a manner different to the rest of the eyes in the series that makes them indescribably beautiful.
Voiced by: Yutaka Aoyama
The leader of Magus Craft. He is Kanon's adopted father whose younger sister is also Kanon's biological mother. He was a former royal court mage at the palace of Aldegyr. He had plans to make Kanon into a weapon to defeat the Fourth Progenitor.
Anti-Villain: Type 3; he wanted to make Kanon into a true Angel because he thought it would somehow bring her happiness, and because the arrival of a Fourth Progenitor, of which there are only supposed to be three of, marks the beginning of something bad, which Kanon's powers would be useful against.
Dragon with an Agenda: At first she seems like a pawn to Kensei, but after he backs down, she attempts to claim the project for herself.
Empathic Weapon/Living Weapon: She uses an "Intelligent Weapon", a Familiar in weapon form, in this case a whip spear. She claims that they aren't exactly a rarity, foreshadowing that they may appear again at a later point.
Expendable Clones: She hopes to create clones of the Angel Faux using the blood of La Folia and then selling them for massive profits.
Gainaxing: The only time her breasts stop bouncing is when she's standing completely still.
Jerkass: Every other villain up until her introduction is downright pleasant in comparison to this bitch.
Put on a Bus: Has to go face punishment for what she did to the prison barrier, but says she'll see Kojou again.
Nice Girl: She really doesn't want to do what she was born to do, and actually chose to steal Kojou's body as the lesser of two evils. The original plan was to sacrifice 100,000 people, but his high magical power made that unnecessary.
She's All Grown Up: In the picture Kojou has of her, she looks almost like a boy. Then she shows up in the Labyrinth of the Blue Witch arc with a massive increase in curves.
The Witch of Nortaria, as well as Yuuma's "mother" and leader of the organization "The Library".
Abusive Parent: Dear god; she is completely uncaring of whether her clone Yuuma survives or not, despite having freed her from the Prison Barrier. Just to rub it in even further, she even rips Le Bleu away from Yuuma, something which is considered a serious injury for Witches.
Animated Armor: Her Guardian, Le Ombre, which is Le Bleu's real identity.
Anti-Magic: Using the Dark Oath Grimoire and Yukina, she plans to deprive the world of all supernatural abilities that are not her own.
Arc Villain: Of "Fiesta for the Observers", although she had an influence in the previous arc.
Barrier Warrior: She can deploy a field that repels and dispels Kojou's Al-Nasl Minium, though it's quickly shattered by Yukina's spear.
Bond Villain Stupidity/Idiot Ball: Perhaps the most extreme example of this in the entire series: She kidnaps Yukina for no purpose other than to exposition as to how her Schneewaltzer actually works and Wangsting over how "witches are mocked and treated poorly" instead of taking out the heroes when she has them at her mercy, and then gives herself in to a Demon for a last-minute One-Winged Angel instead of surrendering despite being heavily outnumbered when she's given a chance to surrender.
Clipped Wing Angel: When cornered and given a chance to surrender, she instead feeds her soul to a Demon to become one herself, although she's still swiftly defeated by a combined attack of Kojou's Regulus Aurum and Yukina's Schneesturm W÷lfin.
Jerkass: The first thing she does upon her appearance? Impale Natsuki and her daughter, then go on about how Yuuma is a disposable piece of trash. Other Prison Barrier inmates aren't fond of her, either, and she even rebukes her own organization's members.
Lack of Empathy: She nearly kills her own daughter in her introducing scene like it was the most casual thing in the world.
Smug Super: She really loves rubbing it in how superior she is to others. However, her plans end up completely foiled by her own negligence of Kojou.
Summon Magic: She's able to conjure replica phantoms of the Meyer Sisters and the defeated inmates, although Kojou's Al-Nasl Minium mops the floor with all of them in a single attack.
Time Master/Laser-Guided Amnesia: Grimore 014, which allows her to steal the very time someone has experienced, robbing them of their experience and memories from that time.
Tome of Eldritch Lore: Her specialty is using these, being the rightful owner of the magic tomes used by Yuuma and the Meyer Sisters in the previous arc. She even attempts to turn the Ayami Academy building into her own Dark Oath Grimoire, given the original one was destroyed by Natsuki.
Amazingly Embarrassing Parents: When she first runs into Kojou in episode 16, the first thing she does is scare him, Yukina, and Sayaka. Then she immediately starts asking the two girls which one of them is his girlfriend, and when she should be expecting grandbabies. Later she fondles Yuuma's breasts and claims it activates her powers.
Badass Labcoat: She wears it while treating Yuuma. Suitably, she has a medical lab in her house.
Bunny-Ears Lawyer: She's a certified magic doctor and a very skilled one at that... who dresses up with Halloween masks and gropes Yuuma's breasts.
Idiot Hair: She has one single lock of hair sticking up on top of her head, and she's portrayed as kind of a doofus. (Although, there's clearly more to her than that.)
I Want Grand Kids: She's very happy to see Kojou bring a bevy of beautiful babes to her door, and eagerly wants to know which of them is carrying her grandchild.
Mama Bear: Has established a contract with Avrora Florestina to use one of Kojou's Familiars to keep Nagisa safe. The catch is that Avrora is inhabiting Nagisa.
My Beloved Smother: When first met, she showers Kojou with affection and asks intrusive questions about his possible relationships to his female companion. Further, Kojou is worried that if she finds out he's a vampire, that she'd want to study or dissect him (although whether because he's a Progenitor or because he's her son is a different question.)
Purple Eyes: Not very uncommon for this series, but important characters tend to have this eye color. As both a very knowledgeable medical mage, the protagonist's mother, and someone with a concealed past, it's hinted that she's far more important than we've seen thus far.
Badass Crew: They are some of the most dangerous criminals in the world, so much so that no other prison than one sealed in a dimensional barrier was a safe place to hold them.
The Dreaded: They're not sealed in a top security Prison Barrier for nothing.
Heroic RROD: If they become too weak or their lives are in real danger, the Prison Barrier system will instantly restrain them and dump them back in the prison.
Quirky Miniboss Squad: Unwillingly for Tokoyogi Aya, who uses them as distractions to complete her own plan.
Teeth-Clenched Teamwork: Some of them clearly don't enjoy the other's company, as Shtra demonstrates by immediately cutting open a fellow inmate to demonstrate the Prison Barrier system still being partially in effect.
We Hardly Knew Ye: They get little screentime to showcase their powers before being defeated and sent back to the prison. Only Meiga Itogami, the former Lion King member, gets away scott-free, however.
Voiced by: Makoto Yasumura
A Kabulistani guerilla who implanted a fire spirit within his body, giving him power over flames. Arrested six years ago for attempted terrorism on Itogami Island.
Implacable Man: Asagi tries to lose him in the sewers, but to no avail. First he melts an automatic doorway that was meant to block him. Then, after seemingly getting carried away by a reversed drainage channel, he shows up again by melting his way out of the sewers.
Lean and Mean: He's quite emaciated and wrinkled compared to the rest of the cast.
Playing with Fire: Implanted a fire spirit within his own body, something which Mogwai notes allowed him to kill his enemies more effectively.
Smug Super: He slooowly chases Asagi through the drainage tunnels of the island, taking delight in the fact that he could cook both her and Natsuki at any time. Asagi evades him long enough to set up various traps, and then leads him to the most heavily-defended part of the island, where he promptly gets his ass handed to him by Astarte.
This Cannot Be!: He's in utter disbelief when Astarte's Rhodactylos drains his spirit energy, which promply leaves him weakened enough for the Prison Barrier system to trigger itself.
Wreathed in Flames: Is perpetually on fire the moment he activates his powers while pursuing Asagi and a de-powered Natsuki.
Eaten Alive: Narrowly avoids this at the hands of one of Vatler's more powerful Familiars when the Prison Barrier system re-enslaves her.
Faux Affably Evil: She speaks in a sugary, sweet voice but once she starts fighting it's clear that this is a mask.
Gag Boobs: Possibly the largest chest in the series thus far.
Ms. Fanservice: She's the most under-dressed woman in the series as of the moment, and that's saying something. As Vatler shows her, though, having a lot of exposed skin and flimsy fabric turns out to not be a good move.
Of Corsets Sexy: The ony other piece of clothing she wears underneath that longcoat besides her thong.
Expy: Of Guts, down to having almost the exact same looking weapon.
Fatal Flaw: Vatler explains that due to his clan's talent as inhumanly strong Dragon Slayers, they are unable to recognize when they are truly outmatched by a greater opponent, as well as the strength dulling their wit so that they cannot outsmart them.
Guttural Growler: He primarily attacks with physical force, so his growling and grunting tends to make him a much more physical presence.
Elemental Punch: "Storm Breaker Axe", Which is powerful enough to be a serious bother even against Yukina's Schneesturm Wolf´n and Kirasaka's Koukarin.
Hoist by His Own Petard: Kirasaka ends up using his wind with her darts to signal the lightning strikes that they cause.
I Take Offense to That Last One: During his battle with Kirasaka, she begins volleying insults at him and men in general, a list of flaws she ends with the fact that "they smell". Sthra only gets furious when she gets to the last one and responds with a "I DON'T SMELL!".
Jerkass: Besides Tokoyogi Aya herself, he is by far the most unpleasant inmate.
A former attack mage of the Lion King Organization, held in the Prison Barrier for unknown reasons.
Affably Evil: Is perpetually calm when addressing himself to Aya and Koyomi.
Awesomeness by Analysis: He's able to deduce that Aya is fooling rest of the inmates by just by seeing her send them to capture a de-powered Natsuki, despite the fact that she stole Natsuki's memories, which contain the key to deactivating the Prison Barrier's system, thereby removing the need to even capture her.
Bigger Bad: It turns out he was using Aya Tokoyogi's commotion as a means to get the Fangzahn back from the Demon District. He also shows up after the climax of "Empire of the Golden Dawn", presumably being the one who summoned the leyline-eating monster in order to sink Itogami Island; while that endeavour failed, he's still quick to note.
Bishōnen: A standout case compared to the rest of the inmates.
Bystander Syndrome: Decides to sit back and watch how Aya's plan will work out while the rest of the inmates are busy chasing down Natsuki, claiming it'll somehow benefit him as well.
Cryptic Conversation: Appears after the climax of Episode 24 talking over the phone with Mogwai, contemplating about the leyline-eating dragon's defeat and musing that the Itogami Island (which he calls "capital of the corrupt") is going to prosper thanks to the Fourth Progenitor and his bride, not to mention the Priestess of Cain.
Karma Houdini: By the end of the "Fiesta for the Observers" arc, he's the only Prison Barrier inmate remaining at large, being free of the system's shackles and having retrieved the Fangzahn. Not even Koyomi stops him.
Body Horror: Half of his body is missing and replaced with some kind of metal, which can turn into liquid state and change shapes.
Complete Immortality: He seeks this in the form of the Wiseman's Blood, although the real reason was to make Wiseman turn him into a true human, which he never was.
Faux Affably Evil: He's polite until he starts fighting, at which point he goes crazy.
Go Mad from the Revelation: After Kanon's Tomato in the Mirror dialogue, he seems to lose his sanity a little. Even after he finds out the truth, he still fights, stating he knows nothing else, until Yukina frees him by vanquishing/vaporizing him.
Go Out with a Smile: When Yukina runs him through with her spear, he finally realizes the meaning behind Nina's speech about being a human, letting a faint smile before getting vaporized.
Healing Factor: He can use metal in his proximity to restore the left side of his body.
Humanoid Abomination: As Nina notes, he's no longer human by the time of the series, being able to transform in liquid metal, as well create copies of himself in the same manner. As we later learn, he was never human.
Knight of Cerebus: Some of his actions include trying to kidnap Kanon, putting Kensei Kanase in a coma and nearly killing Asagi for simply stumbling across while he was manipulating the Wiseman's Blood. He does all this in the episode he is introduced in.
An legendary alchemist who lived over two centuries ago, having reportedly created and subsequently used Wiseman's Blood to obtain an immortal body and unlimited magical power. She is Kou Amatsuka's master.
Alchemy Is Magic: Although she doesn't see low-level techniques to be worthy of being called "alchemy".
Buxom Is Better: Her original body is very well-endowed, so when she finally creates a new one for herself, she borrows Asagi's] appearance but increases the bust size. Natsuki teases Kojou about whether or not this is what he's into, and it's the first thing Yukina notices upon meeting her.
Cool Old Lady: She doesn't look old due to being both essentially immortal and possessing the body of a teenage girl, but she speaks like a woman from another time, and says that "with age comes wisdom". She's nothing but cordial and polite, however.
Hime Cut: The hairstyle that both her liquid metal and real form take.
I Am X, Son of Y: A variant, when she introduces herself as "The Scion of Hermes Trismegistus and perfector of the magnum opus, Nina Adelard of Palmia".
Innocent Fanservice Girl: When she first shows up in Asagi's body, she steps out of Kojou's shower without a stitch of clothing on. Only after he repeatedly asks to get dressed does she finally put on a towel (which doesn't help much) and then borrow Kojou's clothes, and she expresses confusion both times.
Killing In Self Defense: When she first appears in liquid metal form, she brutally slaughters a dude from the inside out. However, said person had made it clear seconds earlier that he intended to destroy her soul so that he could take her power.
Little Person: The size she's stuck in following the Alchemist arc.
Psychic Radar: She can sense that Kou's Wiseman's Blood is still active, indicating that he's still alive.
Rapunzel Hair: Has long, billowing hair in both in her liquid metal form and Asagi's body.
Really 700 Years Old: Astarte claims that Nina Adelard would be 270 years old if she were alive. Her soul is indeed still present, though she has to temporarily share Asagi's body before making a miniature of her own.
Shapeshifter: Her liquid metal form can take a variety of shapes and appearances.
Big Bad: Of the "Alchemist's Return" arc, supplanting Kou's role.
Evil Cannot Comprehend Good: Wiseman claims to be a perfect being, and can't contemplate why he's facing so much resistance from Kojou and the others. Kojou calls him out on it, asking if anyone ever acknowledged him as perfect, or if he's ever used his powers for good. He also claims the former can't be perfect if he's defeated by an imperfect being such as himself.
Un-Person: Kojou defeats him by rewinding time back to a point where Wiseman didn't exist.
Xanatos Gambit: His plan for resurrection which is basically to have Kou gather the necessary materials to facilitate his rebirth. Kou believes that he needs a powerful spirit medium to do this, but that isn't so. He can also do it with trace minerals in sea water.
Xanatos Roulette: There is no way he could have planned for Kanon to be on a boat headed for Tokyo at the exact moment Kou's plan failed. However, Nina speaks as if this eventuality was his plan all along.
Kojou and Yukina's daughter from 20 years in the future; she travels back to the past in episodes 23 and 24 to track down a powerful monster that threatens to sink Itogami Island.
Adorkable: She has traits of this when she's talking to other characters and commenting on them in the past compared to how she's used to seeing them in her present day. Particularly with Asagi who she seems to swoon over to the point of approaching Les Yay, and with Yaze, who will seemingly start to suffer from baldness due to his use of certain hair products. She also slams herself accidentally into a glass door, not being used to non-automated ones.
Blade on a Stick: She wields Hasta Aurum, which resembles a golden Sekkarou. She also summons it in a similar manner to a Familiar, implying it's sentient.
But Now I Must Go: After completing her mission, she goes back to the future, but not before telling Kojou and Yukina that they'll meet her again someday.
Cursed with Awesome: Much like Kojou, she also has the "curse" of immortality. Hence why she shrugs off that seemingly fatal attack moments earlier by the monster she was chasing after.
She's not used to normal glass doors, thinking they'd be automated.
She's astounded by the appearance of several main characters, hilariously letting out that Yaze would turn fat and bald, telling Natsuki that she hasn't grown an inch (complete with "Natsuki-chan"), then calling Nagisa and Asagi "aunt" note "Oba-san" and "Doc" respectively, commenting on how they all look so young.
Gainaxing: Her breasts bounce back and forth during her appearances, something which doesn't sit right with Yukina.
Get a Hold of Yourself, Man!: When Yukina angsts over not being able to protect Kojou anymore due to the broken Sekkarou, Reina snaps back that she should do what she feels is right; not as a Sword Shaman of the Lion King Organisation, but as a girl.
Kid from the Future: She went back in time to track down and destroy a bio-weapon of sorts that drains mana from the ley-lines connecting Itogami Island. That, and to take a look at what her parents looked like in their younger days.
Locked Out of the Loop: Aside from what she's already said to other characters, she was on the verge of telling Kojou who she was, until Natsuki forces her not to reveal that.
Naked on Arrival: She travels into the past in a similar manner to the Terminator, complete with landing naked next to Yukina, quickly proceeding to knock the latter unconscious.
Nosebleed: Another conspicuous attribute that she inherited from Kojou, although it happened when Reina was contemplating Asagi's looks.
Our Vampires Are Different: As Kojou's daughter, she inherited the powers and abilities of a Progenitor, but since her mother is a human, she's more of a half-vampire.
Red Eyes, Take Warning: Just like Kojou, her eyes turn red when she activates her Progenitor powers, willingly or accidentally (as shown by her arousal at Asagi's looks).
"Silly Me" Gesture: After she returns to the future, she says that she misses her Disappeared Dad, implying something terrible happened. She's immediately called out on it by the other lady, saying that she talked to him that morning. Reina then does this gesture, indicating she was joking.
Strong Family Resemblance: Takes after her mother appearance-wise, but with some slight differences; she has Kojou's blue eyes, her skin tone is lighter, and her hair is straight-black instead of dark brown. She's also a little taller and more, ahem, "developed" than her mother.
Walking Spoiler: Her physical traits and abilities are a dead ringer for the fact that she's the protagonists' daughter from the future, giving a literal glimpse at the empire Kojou will eventually build.
Voiced by: Minami Tsuda
Kojou's daughter who's responsible for sending Reina 20 years back to the past. It is stated in the novel's short story that she's Kojou's and Asagi's daughter, making her and Reina half-sisters.
Last Episode New Character: A more extreme example than Reina, since she only makes her physical appearance in Episode 24's epilogue, despite providing Reina with intel earlier on.
Mission Control: What her role is in the "Golden Dawn" arc, assisting Reina from the future by giving her intel on how to proceed forward with her mission (presumably to avoid paradoxes).
Walking Spoiler: Par for the course for future child characters, although in her case she marks the fact that Kojou will have more than one wife.
The previous Fourth Progenitor, who somehow passed her powers unto Kojou three months ago.
An Ice Person: This seems to be her favourite power, as one of her Familiars, Alrescha Glacies, is often summoned whenever Avrora takes control of Nagisa's body, even reducing Vatler to a bloody pulp with it. Taken to the next level when she freezes the sea in order to halt Wiseman's rampage.
One of the three leaders of the Lion King Organization.
Ambiguously Evil: She tasks Yukina and Motoki Yaze with watching over Kojou and suppressing him if his vampiric powers go out of control, given the Lion King's mission seems to be preserving the balance between the humans and demons.
Bystander Syndrome: Decides to do nothing with Meiga Itogami as he leaves with the Fangzahn, claiming that no real harm to the Lion King Organization will come out of it.
Everyone Has Standards: Even she seems somewhat disgusted with Himeragi and Kirasaka being used as nothing more than pawns to be Kojou's "mates".