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- Voiced by: Kentaro Ito
Tropes related to him:
- Accidental Pervert: Often accused of being a pervert and a lolicon by Leica and the kids. Of course, depending on the route, the latter might not be so inaccurate.
- Ascend to a Higher Plane of Existence: Happens to him and Al during her True End when they become Elder Gods.
- Badass: You wouldn't know it to look at him, but this guy consistently refuses to give up a fight, no matter how much pain and harm he goes through.
- Badass Longcoat: His magius form grants him one. The coat can also function as wings, granting him unassisted flight.
- Badass Cape: During the below two moments.
- Brought Down to Badass: Even in the scenarios where he loses Al, and thus the massive boost of power that comes with her, he's still badass.
- Heartbroken Badass: After Al's death
- BFS: In his Elder God◊ form.
- Biggus Dickus: His dong is huge. As in "how does that even fit in his pants" huge.
- Butt Monkey: As Al notes, Kurou does not have good luck with women in his life. Most of the women he does meet treat him rather poorly (at least at first).
- Chronic Hero Syndrome: If he sees someone in distress, he just has to help them out, even if doing so will bring him more trouble in the future. Al gets irritated by this. Due to Nyarlathotep's manipulations, being a pure and perfect "hero" is pretty much completely entwined with Kurou's personality and fundamental nature, which provides some explanation as to why this is.
- Eternal Love: With Al. In a few endings their love literally conquers eternity.
- For Great Justice: While he tries to reject the call at first, he readily admits that doing nothing when injustices are being committed would leave a bad taste in his mouth.
- Hot-Blooded: Oh yeah. He can barely do anything without screaming.
- Jerk with a Heart of Gold: Mostly in the visual novel.
- Knight in Sour Armor: He has no illusions that there are terrible things in the world, and he doesn't believe that everyone, deep down, is good. Nonetheless, he will protect what good there is in the world to the end of his life.
- Parental Abandonment: Both his parents died around the time he was in high school, leaving him penniless.
- Perpetual Poverty: His business is constantly terrible, such that he isn't surprised at all to find his utilities deactivated when he comes home. He also considers being able to have instant coffee in the morning to be a luxury.
- Private Detective: Works as one, but it doesn't really help the above trope.
- Tender Tears: Prone to crying, especially when it involves his financial situation.
- Took a Level in Badass: From impoverished private detective to one of the greatest sorcerers ever to walk the Earth to Elder God.
- Voiced by: Rie Kanda
- Anthropomorphic Personification: Of the Necronomicon, and all the data therein.
- Antiquated Linguistics: She speaks in a rather old manner, notably using the archaic pronoun "warawa" for the first person.
- Ascend to a Higher Plane of Existence: Happens to her and Kurou during her True End when they become Elder Gods.
- Badass Adorable: Looks like a young teenaged girl, and can call upon the powers of Great Old Ones.
- Because You Were Nice to Me: The reason why she falls in love with Kurou: it's the first time she and her master treated each other as comrades rather than tools.
- Clingy Jealous Girl: It's especially prevalent in Ruri's route, but in general she gets annoyed when Kurou spends time with other girls.
- Deadpan Snarker: Can be like this at times.
- Eternal Love: With Kurou. In a few endings, their love literally conquers eternity.
- Gender-Blender Name: She's usually known simply as "Al", which Kurou notes is really a male name, but he thinks "Al Azif" is too much for casual conversation, so he shortens it.
- Heroic Sacrifice: She sacrifices herself to shield and teleport Kurou and Demonbane away from an attack that would definitely have killed them.
- I Just Want to Be Loved: She begins to realize this late in her route: she's never experienced attraction and affection before, and now that she has, she desires it more than anything.
- Jerk with a Heart of Gold: That's one thing she and Kurou have in common.
- Manic Pixie Dream Girl: She can be considered one for Kurou. As soon as she comes in, his drab, monotonous life gets turned upside down.
- Panty Shot: She gets a lot of these due to that Dangerously Short Skirt of hers. Generally she pays it no mind, though.
- Really 700 Years Old: About a millennium old, to be accurate.
- Tiny Tyrannical Girl: She is extremely arrogant and tends to take the view that she should just take what she wants from others. Given her power, there's often little reason why she couldn't.
- Tsundere: Big time towards Kurou. Even at the best of times they are bickering and arguing over every little thing. In her own route, she calms down and becomes noticeably nicer after she and Kurou admit their feelings.
The machine the whole story is based around. Demonbane is a Deus Machina, designed to be used by a human sorcerer and a grimoire. Demonbane is unique among Deus Machina in that it is not generated directly by a grimoire and was built through a combination of human technology and sorcery. It is repeated stated to be a Deus Machina built specifically for humanity, enabling them to fight back against horrors that they would otherwise be powerless against.Demonbane is often treated as a character by those in-story, though it's debatable as to whether it actually does have its own will or not.
- As Long as There Is One Man: Of a sort. The characters like to say that if anyone ever needs Demonbane's help, and calls for it, it will come to fight, no matter what stands in its path. This actually becomes true when Kurou and Al ascend to Elder God status alongside Demonbane, declaring they will fight evil forever, where ever and whenever it may appear.
- Destructive Saviour: A major force for good though it may be, Demonbane tends to cause massive amounts of collateral damage whenever it fights. Even the act of summoning it usually knocks at least a few buildings down.
- Doppelgänger Spin: The Mirror of Nitocris grants it this ability. The doppelgangers are mere illusions that shatter at the slightest touch, but when you need a split-second distraction, it works wonderfully.
- Eldritch Abomination: It starts showing more signs of this once it starts reaching the higher tiers of its power. Most notable is its War God form◊, seen in a prequel novel, where it gained infinite power but lacked the Shining Trapezohedron.
- Finishing Move: The Shining Trapezohedron is its ultimate weapon, only brought out at extreme need. It can also only be wielded when Demonbane is at full power, piloted by a "pure" human being. Once this comes out, the battle is effectively over, as it is completely unblockable and can break space-time in ways that even the Outer Gods find surprising.
- Gondor Calls for Aid: Elder God Demonbane can use the Shining Trapezohedron to do this, a maneuver called "Athleta Aeturnum": It summons versions of itself from... well, basically every universe ever (as well as some universes that don't technically exist), granting itself an infinite army of back-up should it ever require it.
- Guns Akimbo: It usually wields Cthugha and Ithaqua in tandem with one another.
- Healing Factor: Only at higher levels of power, where it gains the ability to self-repair. One method it uses to do this is abusing the time-warping powers of DeMarigny's Clock, rewinding its own time to a point where it wasn't damaged, but not affecting the time of anything else, including its own pilots.
- Humongous Mecha: It stands about 50 meters tall in its normal form, matching other Deus Machina. War God Demonbane is a Size Shifter, and grows so large that it pops the universe it's in and begins crushing a bunch of other universes by accident. Often considered to be the single largest mecha in fiction.
- I Have Many Names: The Innocent Blade, the Innocent Wings, the Sword That Smites Evil, That Which Defies the Dark Mythology... the list goes on.
- Magitek: Most Deus Machina are pure magical constructs and drain the energy of their pilots as they fight. Demonbane's basic chassis is man-made and runs off its own power source, eliminating the need for this.
- Not Quite Flight: The massive shin-guard things on its legs are the "Chain Severing Systems, Timaeus and Critias". They charge up energy by warping spacetime and release massive amounts of force in bursts. Demonbane can use this to boost its jump height enormously as well as "jump" off of thin air or in vacuum. Once it gets Shantak, it can fly freely with no restrictions. Demonbane can also use these to supercharge its kicks, a maneuver dubbed "Atlantis Strike".
- Perpetual Motion Machine: Demonbane's engine, the Cor Leonis, is explicitly an infinite power source that never runs dry. This mainly serves to power the actual machinery though: Demonbane's magic attacks depend much more heavily on its pilot and grimoire.
- Signature Move: Lemuria Impact, which involves trapping the enemy within a closed-off region of spacetime and compressing it all to a single point, generating near-infinite heat. Needless to say, there's not much that can survive a hit from that. It does however, require outside approval in order to be used.
- Super Robot: Most definitely, given that the supernatural is literally built into it. What's never made entirely clear is whether or not Demonbane has a will and consciousness of its own. Kurou and Al like to refer to it like it does, though they may just be waxing poetic about that. On the other hand, in Kishin Hishou, it smashes Tiberius for Ruri despite not currently being turned on or piloted (though this did happen in a dream world).
Sister Leica Crusade
- Voiced by: Nami Kurokawa
- D-Cup Distress: She actually sees little good about her large breasts, noting the back and shoulder pain, and the uncomfortable stares from other people.
- Gag Boobs: The second-largest pair in the game.
- Henshin Hero: She can transform into the white angel "Metatron".
- I'm Not a Hero, I'm...: Though Metatron is called "The Angel of Justice" by the citizenry, she disdains the title and repeatedly says that she has "never claimed Justice". She considers herself a sinner little better than Black Lodge, as her primary motivation (at least at first) for fighting them was revenge.
- Mama Bear: Just ask Tiberius, who found himself on the receiving end of a No-Holds-Barred Beatdown when he tried to assault Alison.
- Meganekko: She wears glasses constantly... except as Metatron.
- Naughty Nuns: While she doesn't display any overt interest in sex, her very revealing swimsuit, the striptease she does while drunk, and the simple fact that she's a potential Love Interest all go sharply against a nun's vow of chastity. Somehow, the reveal that she isn't an actual nun isn't all that surprising.
- Nice Girl: One of the kindest people in the series, although she still enjoys teasing Kurou.
- Obfuscating Stupidity: She pretends not to know what's going on, but she knows quite a lot more than she lets on.
- Orphanage of Love: The church may be run-down and not that financially well-off, but she treats the orphans she looks after like her own children, and they in turn love her dearly.
- Parental Substitute: To the three orphans at the church. And Kurou.
- Secret Identity: As Metatron, the angel of justice.
- You are Number 4: Referred to this way when she was being raised by Black Lodge for the C project.
- You Gotta Have Blue Hair: Her true hair color.
George, Colin, and AlisonThree young orphans that Leica has taken in, now living at the church.
- Alice Allusion: When Alison gets a hold of the Mirror of Nitocris, the phantoms it summons take the form of characters from Alice in Wonderland, her favorite story.
- The Gadfly: They love teasing Kurou whenever he comes around. Kurou usually responds by chasing them around in mock anger.
- Shrinking Violet: Alison, at first. After the Mirror of Nitocris incident, she starts opening up to people a bit more.
- Traumatic Superpower Awakening: It turns out that Alison has a lot of magic potential within her. This usually manifests as a burst of magic energy when she gets really scared.
- Two Guys and a Girl: which causes a bit of friction among them, since the boys will sometimes gang up on Alison. This seems to be as much due to her withdrawn personality and the fact that she's the newest member of the group as due to her gender, though.
- Voiced by: Junko Asami
- Action Girl: Only in her route, where she joins up with Al to fight in Kurou's place when Kurou is hospitalized.
- Big Good: As owner of Demonbane, and the one who coordinates all of the efforts against Black Lodge.
- Brainy Brunette: She is very smart, given the fact that she's the president of Hadou, and is personally involved in managing their finances and resources.
- Can't Hold Her Liquor: She appears to get drunk easily during the Beach Episode, at which point she demands the others entertain her on pain of torture.
- Lonely Rich Kid: She's noted to have never been walking around the city, been on a date, or really done much of anything fun.
- The Ojou: Speaks very formally, holds herself to elegance and propriety (most of the time). Kurou likes to call her "princess" due to this.
- Silk Hiding Steel: A weird case. While she makes a good commanding officer, she's really unused to actual action.
- Status Quo Is God: Played for laughs in Kishin Hishou. Turns out that Ruri still has to handle all business even if they're alive, since her parents went on a "twenty year honeymoon" after her grandfather's death, leaving her to run the company.
- Voiced by: Takehito Koyasu
- Badass Normal: No grimoire, no sorcery. Just Super Reflexes and Super Strength honed over years of intense training.
- Battle Butler: Both Ruri's butler and protector. He Lampshades the fact that Ruri never has a security detail following her, simply because he is around.
- Charles Atlas Superpower: No magical powers here, folks. Just years of good, proficuous boxing training.
- Good Old Fisticuffs: His specialty is boxing, so he doesn't use any weaponry.
- Samurai Ponytail: Providing a good parallel with Titus.
- Stoic Spectacles: He rarely shows emotion overtly.
- Worthy Opponent: Titus considers him as such.
Sonia, Makoto, and ChiakiRuri's three maids, who also run the command center whenever Demonbane is launched. They all have rather... interesting quirks.
- Bridge Bunnies: They fulfill this role whenever Demonbane goes into combat. Chiaki's in charge of mechanics, Sonia runs the radio, and Makoto does analysis.
- Genki Girl: Sonia, who is almost always cheerful and full of energy.
- Lolicon: Makoto is very obviously one, to the point that she disturbs Al Azif. When you manage to disturb the Necronomicon, you might want to tone it down a bit.
- Meido: The three of them are always wearing their maid outfits, even when doing non-maid things.
- Wrench Wench: Chiaki, who is in charge of Demonbane's maintenance.
Stone and NessA pair of police officers who often lament their inability to do anything against the Humongous Mecha and Eldritch Abominations that constantly battle in Arkham City. Stone takes his job very seriously and wishes to fight regardless of the difference in strength, while Ness is more laid-back and prefers to leave the heavy lifting to people who can actually survive a fight.
- A Day in the Limelight: They finally get to do something awesome during Anticross's second attack on the Hadou Group. The two of them take on Tiberius, with Ness going so far as to taser the crap out of him. It only slows down Tiberius of course, but even so...
- Badass: Ineffectual though they may be, they still manage to make a good showing of bravery when things really go to hell.
- Those Two Guys: No real impact on the story, they just provide a common man's look at all the wackiness going on.
DunsanyA shoggoth Al Azif procures soon after moving in with Kurou. Dunsany primarily spends its time as Al's servant, doing whatever she requires at any time. Kurou is a bit creeped out at first by its presence, but Dunsany is a pretty friendly creature, all things considered, and soon becomes part of the household.
- Intelligible Unintelligible: "Tekeli-li" appears to be all it is capable of saying, though the characters often manage to understand it regardless.
- Mundane Utility: What does Al do with this otherworldly creature summoned from beyond time and space? Mainly she sleeps on it, using it like a water bed (Kurou doesn't try this himself until the sequel, and even then he's still creeped out by the idea of a living bed). It is also seen shapeshifted into an inner tube for the Beach Episode and brewing coffee in the morning.
- Team Pet: It's mainly there to be strangely adorable and provide some comic relief.
- Voiced by: Hikaru Midorikawa
- The Antichrist: He names himself as such, though it is unclear just how seriously he means it.
- The Archmage: Best sorcerer in the world. Period. It says something about his status when the Anticross, who generally are extremely selfish and powerful, will immediately obey any order he gives for fear of their lives.
- Authority Equals Asskicking: And how! The only thing who stands the slightest chance in a fight with him is a fully powered Demonbane.
- Badass: Took on Demonbane on foot, without even using his own Deus Machina... and WON!
- Biggus Dickus: Same deal as Kurou.
- Beauty Equals Goodness: Averted. It is mentioned several times that his good looks are so extreme they're almost sickening because of it.
- Bunny-Ears Lawyer: Although Anticross finds his methods questionable, there's no questioning his sheer magical power. Then again, they still kill him off anyways, rejecting his plan to destroy the world.
- Disc One Final Boss: In the first game, he's the mastermind behind all the chaos, but Master Therion himself is a pawn in Nya's scheme, and Nya is the real Big Bad of the whole epic.
- Dissonant Serenity: His expressiveness rarely goes beyond boredom or some sort of vague entertainment.
- The Dreaded: Everyone is completely terrified of him. In his first meeting with Kurou, Kurou describes the sensation he got as if his entire body froze over with fear and dread.
- Evil Counterpart: To Kurou, which is lampshaded quite a few times in the story itself.
- Evil Sorcerer: Part and parcel for being part of Black Lodge.
- Human Mom Non Human Dad: The offspring of Nero and... Yog-Sothoth itself!
- Knight of Cerebus: Whenever he's onscreen, things immediately turn dark and serious.
- Lack of Empathy: Oh, yes. He makes his entrance by shoving Leica aside with enough force to knock her unconscious... and then apologizes and says he can't be bothered to look at insects while he walks.
- Light Is Not Good/Pure Is Not Good: Described as both of these things, while still being unambiguously Evil.
- Non-Linear Character: Due to his parentage, he doesn't seem to view time in the same way most do. In fact, if you want to get technical, he isn't even born until the climax of the story.
- Slouch of Villainy: He rarely takes things seriously, mostly because he doesn't need to.
- Together in Death: In the end, he and Etheldreda are reunited after death at the end of the first game.
- Uncanny Valley: Invoked by Kurou, who states that there is something unnatural and wrong about his extreme beauty.
- The Unfought: In the sequel, the story looks like it's building up to a climactic battle with him. Nope. You get to briefly play as him in one battle against an unexpected foe, and then he gets dissolved by The Power of Love and vanishes.
- Woobie, Destroyer of Worlds: Despite his incredible evil, it's hard not to feel at least a little bad for him after you learn his past and his motivations.
- Worthy Opponent: He considers Kurou and Demonbane to be his, and an all-out fight to the death with them is the only thing he looks forward to. This is the only reason Kurou actually survives to the end of the visual novel, as Therion demonstrates early on that he is easily capable of killing Kurou, but chooses not to, and several times prevents the Anticross from finishing Kurou off.
- Voiced by: Rie Kanda
- Badass Adorable: As small and cute as Al Azif, and, again, capable of calling on the power of the Great Old Ones.
- Clingy Jealous Girl: She can't stand the thought of not being able to shoulder her master's hatred while Kurou and Al can.
- Elegant Gothic Lolita: Her general fashion sense, as a contrast to Al's pure-white clothing.
- Evil Counterpart: To Al-Azif in pretty much every way. She wears black to Al's white, and is stoic and self-sacrificing compared to Al's energy and selfishness.
- Really 700 Years Old: The oldest grimoire. At one point she scoffs at Al's "mere" thousand years of existence, and hints that her own age is well over three thousand.
- Subordinate Excuse: It is quite clear she's in love with Master Therion.
- Together in Death: In the end, she and Master Therion are reunited after death at the end of the first game.
- Undying Loyalty: To Master Therion. This seems to be generally expected of a grimoire, but she goes above and beyond the usual calling.
- Voiced by: Takumi Yamazaki
- Affably Evil: The guy generally introduces himself by rocking out a crazy riff on his guitar, and constantly makes hilarious facial expressions and Large Ham proclamations.
- Anti-Villain: He's still an evil sociopath, but his motives are purely For Science!, not for any love of destruction or pain.
- Badass Biker: Drives a motorcycle around. In one route he even turns it into "The Hunting Horror", a flying motorcycle capable of killing Deus Machina.
- Bunny-Ears Lawyer: Behind all his quirks, the man is a pure genius. He built a fully sentient Robot Girl and the fact that his mechs can even stand up to Demonbane despite being 100% science and not Magitek (outside of Demonpain) is really impressive.
- Ditzy Genius: He's just... weird, and doesn't seem to grasp common sense. That doesn't stop his intellect.
- Even Evil Has Standards: Albeit slightly twisted standards. He's perfectly fine sending Destroyer Robots after Arkham, but completely wanton destruction goes against his standards of beauty.
- Heel–Face Turn: He disapproves of Anticross's insurrection against Master Therion, which leads to Augustus stabbing him. He and Elsa then escape and join forces with the Hadou Group for revenge.
- Idiot Hair: Which often twists into a heart shape for some reason.
- Ineffectual Sympathetic Villain: He's a threat at the beginning of the series, but once the Anticross show up, he's relegated to comic relief.
- Iron Butt Monkey: Constantly gets "the shit beat out of him" and always fails at everything he does. He refuses to be daunted and continues his efforts each time.
- Large Ham: "DOCTAAAAAA WESTOOOOOOO!"
- Laughably Evil: He laughs almost all the time.
- Mad Scientist: Besides building giant robots of doom, he dabbles in crafting androids, and is hinted to have some cyborg experiments going on as well, though we don't see them.
- Musical Assassin: Uses his guitar to control his robots.
- Redemption Promotion: While he was working for Black Lodge, he lost every battle he fought. After his Heel–Face Turn, however, his competency level went through the roof.
- This Is a Drill: One of his Destroyer Robots has multiple.
- Villain Protagonist: In the De Marini no Tokei prequel story.
- You Gotta Have Green Hair: With white at the tips.
- Voiced by: Mikako Sato
- Anti-Villain: Aside from a few moments of meanness, which are Played for Laughs anyway, she doesn't have one bad bone in her body.
- BFG: "Dig Me No Grave", her Anti-Magic energy cannon.
- Comedic Sociopathy: She's a master at this. Especially toward her creator.
- Deadpan Snarker: Usually towards Dr. West's craziest ideas."It's the doctor's fault for being stupid, robo."
- Perky Female Minion: To Dr. West, though she's generally laughing at him rather than with him.
- Pointed Ears: For some reason.
- Ridiculously Human Robot / Robosexual: Looking at her, you'd never think she was actually a robot. She even proves capable of emotions. Her actions on the other hand show a lot to be desired.
- Robot Girl: Played dead straight.
- Small Girl, Big Gun: "Dig Me No Grave" is almost larger than she is, but she can wield it pretty effectively.
- Stalker with a Crush: To Kurou, but it's Played for Laughs.
- Verbal Tic: "-robo!" Kurou remarks that this tic removes any doubt in his mind that she's a robot.
The R'lyeh Texts
The grimoire concerning all matters of Cthulhu and its ilk. Like Etheldreda and Al Azif, she takes the appearance of a young girl. Unlike the other grimoires, she is not bound to any sorcerer and constantly seems to be in her own world.
- Cloud Cuckoo Lander: She rarely if ever takes notice of the things happening around her, instead chanting songs of worship to Cthulhu.
- Happiness in Slavery: When she's offered to Cthulhu along with the C Priestess, she appears to be in ecstasy as Cthulhu's tentacles constantly violate her.
- Mismatched Eyes: One yellow, one purple, matching the colors of her dress.
- Voiced by: Kazuki Yao
- And I Must Scream: His final fate in Al's route. He's absorbed into the Shining Trapezohedron, forever trapped in a dimension of shrieking madness and suffering.
- Anything That Moves: Not even small children are safe from his disgusting lusts.
- Ax-Crazy: He loves violence and death, and is always willing to cause some mayhem for fun.
- Body Horror: His whole body is decaying, which brings to rather disgusting moments during a battle involving him.
- Dumb Muscle: He claims that he doesn't like complicated stuff because his "brain is rotten" (which is actually true, but...)
- Groin Attack: Done to him by Kurou when Tiberius tried to rape Ruri in their first encounter. Sadly, it was nothing Tiberius couldn't regenerate from.
- Hair-Trigger Temper: He's usually rather jolly, though in a sadistic way... but as soon as something goes wrong, he flips his lid.
- The Hyena: When he starts laughing, he really laughs.
- Malevolent Masked Man: Emphasis on 'malevolent'.
- Monster Clown: Wears a clown get-up, and is among the most monstrous characters (given that this game has Lovecraftian horrors in it, that is saying something).
- Rape Is a Special Kind of Evil: Just one of the reasons why even his fellow Anticross members despise him.
- Spirit Bomb: His Vengeful Spirit Bomb, which works on The Power of Hate.
- The Sociopath: An extreme, very low-functioning case.
- The Worm That Walks: His body is dead and rotting, and there are many maggots within him at any given time. He can also summon massive clouds of flies as part of his sorcery.
- Your Soul Is Mine: His ultimate attack uses the souls of those he has killed and/or violated, focusing their despair, pain, and hatred on whomever he uses it against.
- Voiced by: Joji Nakata
- Anti-Villain: He'd rather not kill people he has no beef with, if it can be avoided, and all he's looking for is a match that will push him to his limits.
- Blood Knight: The only thing driving him is the possibility of a Worthy Opponent.
- Does Not Like Shoes: Always walks around barefoot.
- Dual Wielding: Holds one katana in each hand. And then we find out he has four arms.
- Go Out with a Smile: After having fought his last and greatest battle against Kurou or Winfield, depending on route.
- In-Series Nickname: Winfield calls him "Mr. Bushido". He was doing this long before Gundam 00 came out, incidentally.
- Katanas Are Just Better: His primary weapon. He can generate new ones from the palms of his hands if he's ever disarmed.
- Multi-Armed and Dangerous: Both his Deus Machina and himself hide an extra pair of arms, giving him unexpected attack options.
- Noble Demon: He doesn't like killing those weaker than himself, and finds ganging up on the enemy to be distasteful. Doesn't mean he won't do those things, just that he doesn't like it.
- Samurai: He certainly gives this vibe. The narration often describes him as a "dark samurai".
- Worthy Opponent: To Winfield. To Kurou to a lesser extent.
- Voiced by: Masashi Hirose
- Beard of Evil: Sports a great evil orange beard.
- Chronic Backstabbing Disorder: The only side Vespasianus is on is his own.
- The Evil Genius: Fits this more than most of the other Anticross, constantly scheming and performing experiments rather than blowing things up. He previously oversaw the Moonchild Project, an attempt to turn children into living magical weapons by infusing them with both magic and technology, resulting in Sandalphon and Metatron. Its real purpose was actually to create the C Priestess (which was also successful, resulting in The Tyrant). Sandalphon was simply a nice bonus created as a side effect.
- Evil Redhead: His hair color is closer to an orange, but he's definitely evil.
- Faux Affably Evil: His polite mannerism and erudite speech only hide his black heart.
- For Science!: Vespasianus' main objective is to satisfy his scientific curiosity, and he doesn't care about the morality or the consequences of his experiments.
- Mad Scientist: To an event greater extent that Dr. West, who at least has lines he will not cross.
- 1-Up: His familiars grant him three of these.
- Smug Snake: Despite his intelligence, his arrogance and delusions of grandeur limit his effectiveness.
- The Starscream: Not only does he go along with Augustus's plan to overthrow Therion, he betrays Augustus as well in the end to usurp power for himself.
- Berserker Rage: Enters one when he's maimed. He loses all reason and just attacks as hard as he can.
- The Brute: He favors brute force and direct action.
- Combat Tentacles: Kraken's primary form of attack is launching its extendable arms at extremely high speeds. It can also burrow them through the ground to hit the opponent from beneath.
- Dumb Muscle: Not a lot of planning going on here. He does keep a more rational head than some other members of the Anticross, but when he gets hurt, he just goes ballistic.
- Eye Scream: Gets an eye taken out by Kurou during their first battle.
- Moral Myopia: See Claudius' entry. Caligula sees nothing wrong with causing lots of collateral damage, not giving a damn about the people he kills. However, Claudius is a friend and must not be harmed.
- Villainous Friendship: With Claudius, in a Vitriolic Best Buds kind of way.
- Blow You Away: His magic focuses on wind control, as befits an adherent of Hastur.
- Cluster F-Bomb: He's got the dirtiest mouth in the whole visual novel, far beyond even Kurou or Dr. West.
- Enfante Terrible: He looks about ten years old. Whether he actually is is another question.
- Evil Knockoff: The sequel reveals that his grimoire and Deus Machina are actually inferior copies of the real things, which are owned by Laban Shrewsbury.
- Hair-Trigger Temper: It does not take a lot to set him off. Even Caligula's well-meant warnings to him tend to make him livid.
- Lightning Bruiser: Lord Byakhee is extremely fast, reaching supersonic speeds in less than a second. It also has a very powerful energy cannon and can take hits as well as any other Deus Machina.
- Killer Yo-Yo: One of his magic items. He also carries around explosive tops and a kendama.
- Moral Myopia: Claudius and Caligula kill civilians without a care in the world, but when Caligula is killed by Kurou, Claudius swears bloody revenge.
- Roaring Rampage of Revenge: After Caligula's death, he utterly snaps, and shows more raw rage and bloodlust than anyone else has by this point.
- Troubling Unchildlike Behaviour: A 12-13 years old member of a cult of evil sorcerers whose way of speaking would put a sailor to shame. How's that for troubling and unchildlike?
- Voiced by: Norio Wakamoto
- Dark-Skinned Blond: Emphasizing his strangeness, although he may simply dye his hair.
- The Dragon: To Master Therion
- Drunk with Power: After taking control of Cthulhu and calling himself emperor of the world, his restraint - not to mention his common sense - takes a nosedive.
- God in Human Form: In Al's True Ending, Nyarlathotep takes his appearence to serve as its latest avatar.
- Smug Snake: Oh, he thinks he's the most awesome schemer and holder of ultimate power. He never does much to back it up though.
- The Starscream: He's the one who comes up with the plan to betray Master Therion (although Vespasianus didn't seem too surprised by it).
- Stone Wall: His robot, the Legacy Of Gold, is definitely one. It is protected by an extremely powerful forcefield and by an extremely thick armor, and even if an attack gets past all of that, the Legacy Of Gold has huge regenerative powers that can negate all damage in a few seconds.
- Wave Motion Gun: His Legacy of Gold's ultimate attack.
Nero / Ennea
- Voiced by: Mia Naruse (anime), Ari Hinohara (Super Robot Wars UX)
- Animal Motifs: She resembles a cat, both in appearence and mannerisms.
- Ascend to a Higher Plane of Existence: Something happened to her other than a normal death. She shows up in the Elder God ending of the original game, in an unknown time and place but clearly not modern-day Earth, and has a chat with Nyarlathotep before summoning the Elder God heroes to fight it. In the sequel, she appears at the very end alongside the Elder God versions of the heroes, and introduces herself as "Rhapsodus, the Singer of the Myth". It's a little unclear what exactly she's become, other than an apparent ally of Elder God Kurou and Al.
- Bondage Is Bad: Her jail clothes play up the bondage aspect, and she delights in violence and destruction.
- Bound and Gagged: Her original clothes play this up, including a ball gag. Doesn't seem to impede her movement at all, though.
- Cessation of Existence: The Nameless One's most devastating ability, a spell that completely erases everything it hits. Not destroys, but erases. There is no blocking it, there is no surviving it. All one can hope to do is dodge.
- Cute and Psycho: The psycho part is obvious. The cute part only comes out when she ditches the bondage look for more normal clothes.
- Did You Just Romance Cthulhu?: She somehow got pregnant by Yog-Sothoth. Master Therion is the result. Whether this was by her own choice is not clear, but she certainly regrets it now.
- The Dreaded: The rest of the Anticross need a change of pants when they realize she's gotten loose. These are the guys who were seemingly invincible up until this point.
- The Gad Fly: Ennea loves getting angry reactions out of Al, who usually falls for it hook, line, and sinker.
- Humongous Mecha: Even compared to other Deus Machina, the Nameless One is absolutely gigantic, over three times the size of the others. It houses Liber Legis within itself, and "gives birth" to the machine when Nero gives birth to Master Therion.
- Offing the Offspring: She tries this in the sequel, despising her child (Master Therion) for the role it played in her misery.
- Red Baron: So fearsome, she is usually referred to as "The Tyrant" instead of Nero.
- Token Good Teammate: Well, it'd be a stretch to say that she's good, but she is the one member of Anticross who allies (kind of) with Kurou against them.
- The Smurfette Principle: The only female member of Anticross.
- Thanatos Gambit: She's the one destined to give birth to Master Therion, as one of the final pieces in Nyarlathotep's plans. To throw a wrench into them, she tries to force Kurou into killing her. However, Kurou manages to disable her Deus Machina, the Nameless One, without killing her.
- Voiced by: Nobuyuki Hiyama
- Ax-Crazy: He's willing to do anything to make Metatron fight him seriously.
- Cain and Abel: Secretly Leica's brother, Ryuuga Crusade.
- Dying as Yourself: Averted, as he dies in his insanity, still hating Leica.
- Evil Counterpart: Being the angel of despair to Metatron's angel of justice.
- The Power of Hate: His hatred of Metatron is pretty much the only thing keeping him going. It is so strong that he absorbs Etheldreda and replaces Master Therion as pilot of Liber Legis and the final battle in Leica's route, just to kill her (and Kurou, who is protecting her).
- Obviously Evil: Black clad angel, allied with Black Lodge, constantly tries to kill Arkham City's "Defender of Justice"? Yeah, he's evil.
- The Only One Allowed to Defeat You: To Metatron for (almost) killing him.
- Yandere: For Leica / Metatron. He doesn't want to possess her, he just wants to kill her.
- Voiced by: Ai Orikasa
- Bokukko: Since she doesn't really care for being polite. It's also an early hint that she's not actually a woman...
- The Chessmaster: Which isn't at all surprising when you realize exactly who and what she is.
- Eerie Pale-Skinned Brunette: Very eerie. She tends to show up out of nowhere and in the strangest places, only to vanish just as completely.
- Four Eyes, Zero Soul: Wears Scary Shiny Glasses, and is an avatar of Nyarlathotep, the Big Bad of the whole series.
- Gag Boobs: Easily the largest pair in the game.
- God in Human Form: None other than an avatar of Nyarlathotep itself.
- Louis Cypher: Anyone even vaguely familiar with the Mythos can see where this is going.
- Nightmare Face: Whenever a hint of what she really is is revealed.
- Red Eyes, Take Warning: She has red eyes, another hint that you should be wary of her.
- Scary Shiny Glasses: She wears glasses, likely purely for fetishistic reasons.
- The Vamp: Sometimes comes to seduce Kurou, and whether or not he resists in the final chapter of Al's route determines whether he gets the bad ending or not.
Atlach-NachaA Great Old One associated with spiders. Summoned by the out-of-control power of Al Azif's lost pages, it appears in the form of a woman, captures people in webs, and takes them away.It is eventually recaptured by Al and lends her power to Kurou and Demonbane.
- All Webbed Up: It's a spider god, what did you expect?
- Prehensile Hair: The power it gives to Kurou and Demonbane: the ability to make a giant magical web out of their hair to trap and ensnare enemies.
- Spider People: Again, we're talking about a spider god here.
- Succubus: Uses sex to drain the life force out of its victims.
Dagon and Hydra
Servants of Cthulhu summoned during "The Shadow over Innsmouth" as a "test run" for the C Project. Because Dagon was summoned before "the stars were right", it is weakened and extremely angry. It soon summons its mate, Hydra, to help it against Demonbane.
- Combination Attack: Several times during the battle, Dagon and Hydra combine themselves into a single creature. It's described as part of their "mating" process.
- Kaiju: Dagon is the first giant non-robot fought in the game, and the first encounter with a true Elder Creature that Kurou has.
- So Last Season: Thousands of Dagon and Hydra appear at Cthulhu's behest to do battle against the combined human military. By this point, Demonbane has powered up so much it can take them down by the dozens without even trying.
- Vampiric Draining: They can drain the life force from mortal creatures to sustain themselves.
The Great Old One of flame and fire, Cthugha is among the deities Al Azif can summon. However, due to Kurou's inexperience, it takes quite some time to get Cthugha under control.
- Defeat Means Friendship: After Kurou... subdues Cthugha, it takes a liking to him and brands him with its mark, allowing Kurou to summon it even without Al's help.
- Empathic Weapon: Kurou eventually transforms the Cthugha summoning spell so that Cthugha arrives in the form of an automatic pistol, which makes its power much easier to control. Demonbane can summon a suitably scaled-up version as well.
- Kill It with Fire: Pretty much what Cthugha does whenever it gets summoned. Anything within several miles of it melts or vaporizes almost instantly.
- You Don't Look Like You: In the Mythos proper, Cthugha is generally a gigantic living fireball. And while it does often appear in that guise, there's a great horned beast at the center which is Cthugha itself.
The Great Old One of ice and snow, Ithaqua is another deity that Al Azif can summon. Again, due to Kurou's relative inexperience, it takes a while for him to reliably control it.
- Defeat Means Friendship: After Kurou... subdues Ithaqua, it takes a liking to him and brands him with its mark, allowing Kurou to summon it even without Al's help.
- Empathic Weapon: Kurou eventually transforms the Ithaqua summoning spell so that it arrives in the form of a silver revolver, making its power easier to control. Demonbane can summon a scaled-up version as well.
- Kill It with Ice: Ithaqua's presence means that anything nearby is instantly frozen.
- You Don't Look Like You: Ithaqua in the Mythos proper is generally a humanoid thing with glowing red eyes that can walk on wind. In the game, it first appears as a blizzard (with glowing red eyes amongst the clouds), and later as a dragon made of ice.
The "Great C" himself, Cthulhu is the Great Old One destined to awaken "when the stars are right" and reign over Earth once more. Black Lodge plans to intervene with the summoning and use Cthulhu's powers for themselves.
- Eldritch Abomination: Stands out even among the other Great Old Ones; his mere appearance causes everyone's mind and will to grind to a halt.
- Living MacGuffin: Due to Black Lodge's manipulations, Cthulhu spends most of his time either half-asleep or under their control.
- You Don't Look Like You: Because he is summoned into Black Lodge's Illusory Heart Mother, Cthulhu appears as a gigantic flying ball of metal with flesh and tentacles emerging every which way, rather than the squid-headed humanoid he's usually depicted as.
The Outer God of Time and Space, the All-in-One and One-in-All. He makes an appearance near the end of the story and plays an important role in its climax.
- A Form You Are Comfortable With: Turns into a giant floating gate in the sky soon after showing up. He also appears in his guise as 'Umr at-Tawil to guide Demonbane to the final battle.
- Eldritch Abomination: Moreso than any other in the story, Yog-Sothoth briefly overwrites reality and nearly annihilates everyone's sanity when he appears, before he shifts forms into something less incomprehensible.
- Noble Demon: The one Eldritch Thing that isn't hostile to the heroes, and indeed is even somewhat helpful.
The Dunwich Horror/Wilbur WhateleyThe reason Kurou decided to leave Miskatonic University and never deal with magic ever again. He is quickly dispelled by the senior staff, but his presence continues to haunt Kurou.He is re-summoned for the sequel and plays a larger role in the narrative.
- Battle in the Center of the Mind: Where Kurou and Ruri eventually fight and finally defeat him, within Kurou's memory.
- Combat Tentacles: His favorite form of attack. Sometimes he doesn't even bother manifesting fully, instead just tearing a hole in space-time and attacking with his tentacles through that.
- Composite Character: He acts much more like Wilbur's Eldritch Abomination twin brother than Wilbur himself. Strangely enough, the fact that Wilbur had a twin is mentioned repeatedly in the story.
- Enemy Within: His presence remains in Kurou's mind, and needs to be exorcised before he can fully reach his potential.
- Humanoid Abomination: Looks like a mishmash of human, goat, and tentacles.
- Human Mom Non Human Dad: Anyone who knows the Mythos will be familiar with his lineage: he was born of a human woman and Yog-Sothoth. This makes him Master Therion's half-brother, a fact which is acknowledged by Therion in the sequel.
- Invisible Monster: According to Al, he can shift himself into other dimensions, rendering himself invisible to normal sight. When he tries this in the sequel, the Miskatonic Professors use a spell to anchor him to this dimension.
- Kaiju: The form he assumes in the sequel: a gigantic, fleshy tear-drop shaped body with no legs, no head, and two extremely long arm-tentacles. A Deus Machina is required to take him down in this form.
- Non-Malicious Monster: In the sequel, he really doesn't seem to be fully aware of what's going on around him, and is just lashing out in fear at dangers to himself. His final words are even a desperate plea for Yog-Sothoth to save him. Doesn't apply to the first game, where he is most definitely malicious.
The series primary antagonist. Nyarlathotep is the will and messenger of the Outer Gods, spawned directly from Azathoth itself. It has thousands of different "avatars" through which it interacts with the world(s), but a common feature to all of them when they show their true nature are three evil red eyes. It makes appearances in every entry in the franchise, through one of its various avatars.
- Big Bad: Of the whole franchise.
- The Chessmaster: It prefers to operate from the shadows, manipulating others rather than acting directly.
- Eldritch Abomination: It appears as a great winged being of darkness with three red eyes, but it can assume one of thousands of other forms at will. It has a "mask" in every universe that has ever existed, does exist, or will exist. Killing one mask is ultimately irrelevant; Nyarlathotep cannot ever be truly destroyed, and it can always come back from another timeline and another universe. For this reason, it also cannot be sealed in the Shining Trapezohedron with the other Outer Gods.
- Gambit Roulette: The whole series is one spun by it in order to release Azathoth and the other Outer Gods.
- Hoist by His Own Petard: Too bad for it, it didn't expect Kurou to be able to combine the power of two Shining Trapezohedra into a single Laser Blade BFS and use it to effectively make its own plan negate itself.
- I Have Many Names: The Clockwork Phantom, the Black Pharoah, the Haunter in the Dark, the Crawling Chaos, Nya, Nyala, Father Ny... Nyarlathotep.
- Louis Cypher: It really isn't all that imaginative with the names it gives its human avatars in this series.
- Manipulative Bastard: He/she/it doesn't tend to use overt displays of power all that much, preferring to meddle from the shadows.
- Nightmare Face: Whenever a hint of what it really is is revealed.
- Red and Black and Evil All Over: Glimpses of its true self sports this color-scheme.
- Slasher Smile: It's, um... face, has a design that easily resembles this.
- Story-Breaker Power: Displays of its power are rare, but when they happen, they tend to be game-changers. Its raw power, when it chooses to wield it, is among the greatest in the infinite universes. Examples: teleporting Cthulhu against his will, erasing entire timelines with a thought, and time-looping multiple universes as part of its grand master plan.
- Villainous Breakdown: A pretty epic one whenever it realizes it has lost. Outer Gods are not used to being Punched Out.
A mysterious girl calling herself the Necronomicon: Blood Edition. She is highly skilled in blood sorcery and pilots a blood-red Demonbane known as "Demonbane Blood". She is very hostile towards Al Azif, wanting to devour her to gain her power, but rather more affectionate toward Kurou.
- Ancestral Weapon: Let's just say there's a reason she is piloting Demonbane.
- Blood Magic: Her specialty. Pretty much everything about her is named for blood.
- Half-Human Hybrid: She is half-human, half-grimoire. She's more of a spirit than a physical existence though.
- Heel–Face Turn: After she works out her parental issues and realizes that Nyarlathotep is manipulating everything (again).
- Kid from the Future: She's actually a potential daughter of Kurou and Al that never existed, because that timeline never developed. The reason she exists now is because Nyarlathotep did some Outer God things and pulled her out of potentiality.
- I Just Want to Be Loved: Her greatest desire is to be acknowledged and loved by Kurou, her father.
- Manchurian Agent: Unknown even to herself, she is, at least partially, an avatar of Nyarlathotep. When she consumes Al Azif and "becomes real"... so does Nyarlathotep, who immediately discards her identity to take its own form.
- Meaningful Name: She hates her name, since it's an indication of her circumstances: she is an alternate version of Kuzaku, therefore she is "Another" version of his "Blood".
- Paradox Person: She's not even supposed to exist. And she's really, really angry about it.
- Parental Abandonment: She sees herself as having one of the worst possible cases of this: the timeline in which she was born never happened, meaning that her parents never took the steps that would lead to her birth. This is basically the reason she hates everything: it exists, it has a purpose, but she does not.
- Reality Warper: She tries to overwrite the universe with a "nightmare world" born of Al Azif's memories. As a result, she revives all the old enemies that Al Azif has ever faced, including the Anticross, the Dunwich Horror, Zs-A-Wia, Master Therion... Fortunately, the revived versions all seem to be slightly less powerful than the originals.
A strange boy who appears around the same time as Another Blood, piloting yet another Demonbane known as the "Demonbane Two-Swords". He does battle against Another Blood and seems to bear a grudge toward Kurou and Al Azif, despite cooperating with them.
- Ancestral Weapon: He can wield Cthugha and Ithaqua, just as Kurou does. Not to mention that he's piloting Demonbane.
- Berserk Button: Do not imply that Kurou and the original Demonbane are better fighters than he and Two-Swords are.
- Blood Magic: While he doesn't craft his entire character around it like Another Blood does, he's nearly as skilled with blood sorcery as she is.
- Dual Wielding: His specialty, as one might infer from his title. In addition to the guns, he also dual-wields swords by the names of Lloigar and Zhar (implied to be summoned Great Old Ones in the same manner as Cthugha and Ithaqua).
- Half-Human Hybrid: Half-human, and half-grimoire. He explains it as all the data in a grimoire, rather than being encoded as written words, is encoded in his genetic makeup.
- Kid from the Future: He's Kurou's and Al's son from another timeline.
- Knight in Shining Armor: He calls himself as such, and his speech reflects this. Another Blood mocks him for it, calling him "Don Quixote".
- Parental Abandonment: He was left in the care of the Ruri Hadou from his timeline, while his parents disappeared. He has not forgiven them for this.
- Daddy Had a Good Reason for Abandoning You: Kurou and Al left him behind when they went to war with the Outer Gods, not wanting him to get involved.
- Red Baron: He's known as "Two Swords, Two Guns" for his signature dual-wielding style.
Laban ShrewsburyAuthor of the Celeano Fragments, protagonist of the Mythos story "Trail of Cthulhu", and a professor at Miskatonic University. He is also the operator of the Deus Machina Ambrose. He appears in the sequel, looking into the case of the mysterious "blood monsters" that have been appearing.
- Badass: Anyone who can survive a trip to Hastur's domain is going to be pretty dang tough.
Shrewsbury: Did you really think... that Hastur's powers were limited to the wind?
- Badass Grandpa: He may be old, but he can still kick quite a lot of ass! Although he's taken off-guard by Claudius' power several times at first, the final time they fight he thoroughly schools the Anticross sorcerer.
- Big Damn Heroes: Every other appearance in the sequel has him bailing Kurou out of a jam.
- Cool Old Guy: Sorcerer, Deus Machina pilot, and the author of a grimoire.
- Cool Shades: Always, always, always wears sunglasses. Because he gouged out his own eyes after they saw... something.
- Make Me Wanna Shout: His "Song of Hastur", a magical scream/song/wail that causes the blood to literally boil in anyone who hears it (save himself).
- Sinister Scythe: His Ambrose's main weapon.
- Super Prototype: His Ambrose is the original form of Claudius' Deus Machina, and is far more powerful than the latter.
HazukiThe original Celeano Fragments, written by Laban Shrewsbury. She remains by his side, and refers to him as "Daddy". She appears in the sequel, aiding him in his efforts.
- Anthropomorphic Personification: Of the Celeano Fragments.
- Does Not Like Shoes: Aside from a few straps of leather around her legs and feet, she goes barefoot.
- Emotionless Girl: She doesn't emote all that much, and tends to speak in a monotone. This is contrasted with the actual words she uses, which can be rather energetic and excited.
- In Universe Nickname: Shrewsbury always refers to her as "Lady" (in English).
- Nice Hat: One that looks like a mime's.
Drs. Henry Armitage, Warren Rice, and Francis MorganThree professors at Miskatonic University. They begin investigating the "blood monsters" in the sequel, and try to enlist Kurou's help in dealing with them.
- The Cameo: Armitage is mentioned several times in the original game, but doesn't appear and has no impact on the plot. He also shows up briefly in the prequels, revealed to be working closely with Kouzou Hadou with Demonbane's development.
- The Mentor: Armitage seems to have been a mentor to Kurou, before he dropped out. Kurou refers to him as "Armitage-ojisan", or "Uncle Armitage". Armitage has made it clear that Miskatonic would accept Kurou back in a heartbeat if he wanted to, but Kurou has no intention of doing so.
- Mission Control: They don't have Deus Machina of their own, so they're a bit out of their depth in dealing with the threats currently facing Arkham City, and they know it. Thus they get this job, alongside the Hadou crew.
Ruri's grandfather and founder of the Hadou Group. Originally a simple miner, he found something extraordinary in the Arizonan desert and used that to start investing and building his massive corporate empire. He is described as more of a "force of nature" than a human being, constantly on the move, eccentric to the extreme, and forever investing in strange things that always turn out to be of great value.In secret, he is a sorcerer and the original finder/builder of Demonbane. Everything he has done throughout his life has been for the sole purpose of preparing and using Demonbane against Liber Legis and Master Therion. For a grimoire, he uses a copy of the Necronomicon, and he is able to pilot Demonbane to a certain extent, though not anywhere near its full power.
- Badass Beard: He has one of the most epic beards in the series, and is a highly capable sorcerer able to fight almost evenly with Master Therion.
- Clock Punk: He manages to get Demonbane operational in the 1940's by building an analog mechanical computer (he bought Charles Babbage's Difference Engine to use as the prototype) into its cockpit, and using a Necronomicon made out of punch cards to run it.
- Fiction500: He's described as essentially owning Arkham City and having influence and power comparable to entire first-world governments.
- Stable Time Loop: In reality, he is Kurou after a failed attempt to defeat Liber Legis left him stranded on Earth in the past. He met the dying Kouzou Hadou and assumed his identity, eventually adopting Kouzou's son and building the Hadou Group as it exists in the original game.
Augusta "Ada" DerlethA young and wealthy reporter from London, and a self-proclaimed "Knight of Science". She spends her time writing her self-published newspaper and attempting to be a superhero at night with the help of a diving-suit like Powered Armor, though she isn't very good at the latter. Her investigations lead her to Kouzou Hadou and the secrets of Demonbane and sorcery, and she becomes one of Hadou's closest friends and supporters.She eventually marries Hadou's son, and is Ruri's mother.
- Expy: She's basically 1940's female Batman, except rather bumbling in her attempts at crime-fighting.
- Meganekko: Artwork shows her as wearing glasses.
- Powered Armor: Her diving suit... thing. It has a tendency to overheat and vent steam into the helmet though, severely limiting its usefulness.
- Steam Punk: All of her inventions live and breathe it. She even builds a clockwork and steam-powered Humongous Mecha, Goliath.
- Science Hero: She likes to think of herself as such. She is a legitimately brilliant engineer, but her suits never seem to live up to her hopes. She gets much better when she begins to incorporate sorcery into her work, with Hadou's help.
- Trademark Favorite Food: Ice cream. She loves it so much that she willingly gets "ice cream headaches", believing that this pain promotes a person's mental growth and development.
NyarlaAugusta's maid and servant. Nyarla is constantly by her side, helping her with whatever endeavor she's currently working on.
- Ambiguously Brown: Described as dark-skinned, though her ethnicity is never made clear. Which is yet another clue: Nyarlathotep often prefers making dark-skinned human avatars in the Mythos.
- Keigo: She speaks extremely formally and politely, which is more than a little creepy after Nyarlathotep drops the pretenses, and its speech clashes heavily with its tone.
- Louis Cypher: This one is even more blatantly obvious than "Nya" above.
- The Mole: As one might expect, she is yet another avatar of Nyarlathotep, maneuvering Augusta into the path she needs to take for the Crawling Chaos' plans to come to fruition.
One of Al Azif's past masters, before she met Kurou. Azrad is an Arabian man who became a sorcerer in order to hunt down and take revenge on an evil sorcerer who killed his family. He tends to be single-mindedly fixated on that goal, but joins up with Kouzou Hadou when he realizes that Hadou is fighting the same evil sorcerer he is. His grimoire is the Necronomicon, and his Deus Machina is Aeon.He makes a return appearance in the sequel, subconsciously summoned up by Al Azif in a desperate attempt to have someone to defend her against the nightmare world. As his revenge has been accomplished by this point, he throws all of his efforts into helping the heroes against Another Blood.
- Back from the Dead: He appears in Kishin Hishou due to Al Azif interfering with Another Blood's spells, resurrecting him alongside Anticross.
- Badass in a Nice Suit: Always described as wearing the suit of a British gentleman, complete with cane and top hat.
- Name's the Same: Some fans mistake his name for a Japanese corruption of "al-Hazred", author of the Necronomicon. This isn't the case: while he is Arabian, Azrad is a completely different character, and lives almost a thousand years later than al-Hazred.
- Revenge: It's all that motivates him. Averted in his appearance in the sequel, where his goals are much more altruistic.
- Weapon of Choice: The Scimitar of Barzai. He's even better at wielding it than Kurou, and is able to do such things as duplicate it up to ten times and control each blade separately.
Kanesada HadouKouzou Hadou's son, heir to the Hadou Group, and Ruri's father. He has always had a rather distant relationship with his father, but has nothing but respect for the man's accomplishments. He gets involved during Kouzou's disappearance in Gunshin Kyoushuu, the second prequel.
- Good Old Fisticuffs: Quite a decent boxer. He also has no fear of knives in a fist fight, easily overpowering armed opponents.
- "Well Done, Son!" Guy: As a child, he blamed his mother's death on his father's disappearance. After his father made it big and came to the orphanage to retrieve him, he has always felt distant, like Kouzou is avoiding him. This is likely because "Kouzou" is in fact Kurou Daijuuji, and Kurou felt awkward treating another man's son as his own.
EdgarAnother of Al Azif's past masters, whom she met after Azrad's death. Edgar is a British orphan who just wants to have fun doing whatever he wants, and hates others trying to tell him what to do. His grimoire is the Necronomicon, and his Deus Machina is Aeon.
- Cynicism Catalyst: His younger brother, Arthur, whom he was unable to save from death.
- Determinator: Arguably even moreso than Kurou, considering the events of his final battle.
- Only One Name: His last name, if he even remembers it, is never given.
- Ret Gone: He got himself into an unbreakable stalemate with Master Therion. Nyarlathotep didn't like that, so it erased Edgar's existence, removing that timeline from the multiverse. It is suggested, however, that part of Edgar's indomitable will lives on in the current timeline.
- Spanner in the Works: Nyarlathotep maneuvered him into becoming Al's master in an attempt to break the stalemate between Hadou and Master Therion. He ended up becoming War God Demonbane's pilot and fighting so evenly against War God Liber Legis that an eternal stalemate broke out between them, neither able to defeat the other.
- Younger Than He Looks: Though he looks in his twenties, he's actually only about ten years old, which explains some of his behavior. Nyarlathotep aged him up when he made a pact with it to become Al Azif's master.
Raal RovdyAn evil sorcerer and leader of the sorcery cult known as the "Dawn of Darkness". His goal is summon the ancient Great Old One Zs-A-Wia, who slumbers beneath the Amazon Basin, and he leads the tribe of lizard-men who worship said Great Old One. He is also the sorcerer responsible for the death of Azrad's family. His grimoire is The Prayer Book of Blood.
- Adventurer Archaeologist: This is how he presents himself to the general public, and how he got funding to go into the Amazon wilderness in the first place.
- Evil Sorcerer: An adherent of a Great Old One associated with death and pestilence. Leader of the "Dawn of Darkness". Definitely not a good guy.
- Voluntary Shapeshifting: He killed Azrad's wife, Warda, to gain her appearance. This is because the summoning ritual for Zs-A-Wia can only be conducted by a woman.
Zs-A-WiaA Great Old One that lies dormant beneath the Amazon basin. It is associated with death and disease, and is worshipped by a tribe of lizard-men that have had no contact with the outside world. Raal Rovdy seeks to awaken it.This appears to be an original Great Old One invented for the world of Demonbane, though it does share some loose similarities with established Great Old One Zushakon.
- Early-Bird Cameo: After its death, a human body emerges from its remains... namely, Master Therion.
- Eldritch Abomination: When it appears, it's as a vast sea of reddish-black, extremely toxic tar, with tentacles coming out. The remains of this tar crystallize into Liber Legis upon its death.
- The Unpronounceable: "Zs-A-Wia" is an approximation by a man who accompanied Raal Rovdy on his "expedition". Apparently the "zs" is a sound the lizard-men produced by blowing air through their sharp teeth, that humans can't quite get right.
- Walking Wasteland: Anything that touches its tar dies instantly. Arkham City's Sealed 13th District is where it died, and it is the reason the district was sealed: even decades after its death, walking into that area without protection of some sort means death.