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* DudeLooksLikeALady: Very much so.
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* DudeLooksLikeALady: Very much so.[[spoiler:Or so it seems...]]
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* HasTwoMommies: [[spoiler: Both Jin and Chisato have made mentions that Basara has two mothers and neither of them being stepmothers.]]
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* MissingMom: His mother passed away a long time ago.
to:
* MissingMom: His mother passed away a long time ago. [[spoiler: Actually, he has two.]]
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%%* GirlishPigtails
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%%* RedHeadedHeroine
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%%* GirlishPigtails
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* HeartmanHips: According to Marie, this is her counter against Mio's impressive chest. In fact, most of her MaleGaze scenes focus on her hip area.
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* HeartmanHips: HartmanHips: According to Marie, this is her counter against Mio's impressive chest. In fact, most of her MaleGaze scenes focus on her hip area.
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%%* ReasonableAuthorityFigure
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* TheTease: At first it was rather simple teasing,
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* TheTease: At first it was rather simple teasing, teasing.
* {{Bifauxnen}}: [[spoiler:Nanao reveals herself as a woman by the time volume 9 rolls around.]]
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%%* {{Megane}}
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* HeartmanHips: According to Marie, this is her counter against Mio's impressive chest. In fact, most of her MaleGaze scenes focus on her hip area.
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A bit of knowledge from the Light Novels that anime-only watchers probably don't know
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* {{Bi the Way}}: It's mentioned several times in the Light Novels that Kurumi has received Maria's "succubus baptism" quite a lot offscreen. In Vol 5 Maria outright states that she is venting her libido on the poor girl. But of course, by the time Kurumi joined the main cast Maria had already fallen for Basara.
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%%* {{Tsundere}}
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* {{Meganekko}}
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* {{Meganekko}}{{Meganekko}}: Chisato wears glasses.
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missing ZCE
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* ChickMagnet
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rm ZCE; cleanup
%%
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* ActionGirl
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* FieryRedhead
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* GirlishPigtails
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* RedHeadedHeroine
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* GirlishPigtails
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* TheStoic
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* ActionGirl
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* {{Tsundere}}
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* ActionGirl
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* YouHaveOutlivedYourUsefulness: Zolgear decides to kill her after feeling that he no longer needs her.
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* ReasonableAuthorityFigure
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* {{Megane}}
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* MsFanservice: Mio is often seen from low angles to show off her shapely body.
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* MsFanservice: MaleGaze: Mio is often seen from low angles to show off her shapely body.
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revealed in the latest Light Novel
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* GenderReveal: [[spoiler: Is revealed to actually be a woman in volume 9]]
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* DefrostingIceQueen: Starts off as a cold, ruthless servant of Zolgear. By the time she swears fealty to Basara, however, she's become a whole lot nicer.
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* TookALevelInKindness: Becomes a lot nicer in the second season, after she leaves Zolgear.
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* DefrostingIceQueen: While starting off as pretty {{Tsundere}}, she becomes much more openly affectionate to Basara as the series goes on.
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* VitriolicBestBuds: With Maria.
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Character page for the light novel and anime series ''LightNovel/TheTestamentOfSisterNewDevil''.
to:
Character page for the light novel and anime series ''LightNovel/TheTestamentOfSisterNewDevil''.
''LightNovel/TheTestamentOfSisterNewDevil''. Beware of spoilers for Season 2!
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-> Voiced by: Creator/Iori Nomizu
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-> Voiced by: Creator/Iori Nomizu
Creator/IoriNomizu
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-> Voiced by: Creator/Seiko Yoshida
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-> Voiced by: Creator/Seiko Yoshida
Creator/SeikoYoshida
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Changed line(s) 146 (click to see context) from:
* IncestIsRelative: [[spoiler: Her affections for Basara were that of a teasing, barely older than him aunt that escalated rather quickly. It's implied between the lines that she may have had the same affections for her sister.]]
to:
* IncestIsRelative: [[spoiler: Her affections for Basara were that of a teasing, barely older than him barely-older-than-him aunt that escalated rather quickly. It's implied between the lines that she may have had the same affections for her sister.]]
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* PowerLimiter: [[spoiler: Chisato is actually a high class angel named Afleia. Most of her power was sealed when she transitioned to Earth. This seal is lifted when her power for one sole purpose : protecting Basara ]]
to:
* PowerLimiter: [[spoiler: Chisato is actually a high class high-class angel named Afleia. Most of her power was sealed when she transitioned to Earth. This seal is can be lifted when her power is utilized for one sole purpose : protecting Basara ]]
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* ShesGotLegs
* TheTease
* TheTease
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* ShesGotLegs
ShesGotLegs: Which get shown a lot due to her short skirt.
*TheTeaseTheTease: At first it was rather simple teasing,
*
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* AnnoyingYoungerSibling: Can be a little bit haughty, but her heart's in the right place.
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[[/folder]]
[[folder: School]]
!Chisato Hasegawa
-> Voiced by: Creator/YuuAsakawa
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to him, even when he purposefully kept her in the dark about his dealing with demons and the heroes, was always spot-on. Later on, it becomes apparent that she has much more than a passing interest in the young Basara.
[[folder: School]]
!Chisato Hasegawa
-> Voiced by: Creator/YuuAsakawa
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to him, even when he purposefully kept her in the dark about his dealing with demons and the heroes, was always spot-on. Later on, it becomes apparent that she has much more than a passing interest in the young Basara.
to:
[[folder: School]]
!Chisato Hasegawa
-> Voiced by:
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to
Yuki's little sister who is also from the Hero Tribe. Initially antagonistic towards Basara after meeting him,
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* ActionGirl
* AnnoyingYoungerSibling: Can be a little bit haughty, but her heart's in the right place.
* ButtMonkey: Maria toys with her constantly.
* {{Tsundere}}
!Zest
-> Voiced by: Creator/Seiko Yoshida
A Demon who initially served her creator, Zolgear. After Zolgear's defeat, she serves Shella (Maria's mother) before ultimately serving Basara.
-----
* ActionGirl
* HeelFaceTurn: Sides with Basara after Zolgear discards her.
* UndyingLoyalty: Declares her eternal loyalty to Basara in the second season.
[[/folder]]
[[folder: School]]
!Chisato Hasegawa
-> Voiced by: Creator/YuuAsakawa
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to him, even when he purposefully kept her in the dark about his dealing with demons and the heroes, was always spot-on. Later on, it becomes apparent that she has much more than a passing interest in the young Basara.
-----
* AnnoyingYoungerSibling: Can be a little bit haughty, but her heart's in the right place.
* ButtMonkey: Maria toys with her constantly.
* {{Tsundere}}
!Zest
-> Voiced by: Creator/Seiko Yoshida
A Demon who initially served her creator, Zolgear. After Zolgear's defeat, she serves Shella (Maria's mother) before ultimately serving Basara.
-----
* ActionGirl
* HeelFaceTurn: Sides with Basara after Zolgear discards her.
* UndyingLoyalty: Declares her eternal loyalty to Basara in the second season.
[[/folder]]
[[folder: School]]
!Chisato Hasegawa
-> Voiced by: Creator/YuuAsakawa
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to him, even when he purposefully kept her in the dark about his dealing with demons and the heroes, was always spot-on. Later on, it becomes apparent that she has much more than a passing interest in the young Basara.
-----
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* PowerLimiter: [[spoiler: Chisato is actually a high class angel named Afleia. Most of her power was sealed when she transitioned to Earth. This seal is lifted when her power for one sole purpose : protecting Basara ]]
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* TranquilFury: Harming Basara in front of her will have her kill the culprit without mercy. A manner in which she might as well be discussing the weather.
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* ActionGirl
to:
* ActionGirlActionGirl: Though she stays out of much of the fighting, she can hold her own in a fight.
* ShamelessFanserviceGirl: Does not mind showing off to Basara. Or more likely, forcing Mio into compromising situations.
* StrongButUnskilled: Well, better than Mio in combat at least. But she doesn't fare very well against Lars during their duel in ''Burst'' since she relies heavily on physical attacks which he easily evades.
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* ActionGirl
to:
* ActionGirlActionGirl: It doesn't take long to show that she's quite a capable and competent hero.
* RescueRomance: Though it's probable she liked Basara before, she definitely falls in love with him after he protects her from the attacker during their younger years. She is certainly happy when she sees him using that same power years later, but controlling it much better than the first time he used it, in order to continue protecting people.
* DrillSergeantNasty: Doesn't go too easy on Basara during their training sessions in ''Burst''. At one point he even attacked his son with the intention of killing him, in order to help him master his powers faster.
* GenreSavvy: He knew of Maria's and Mio's true identity when he met them. He then played along with their attempt to brainwash him, and later reveals to Basara why he felt they needed to be protected. He then sets out to uncover whatever the current demon lord and his faction were attempting.
* GenreSavvy: He knew of Maria's and Mio's true identity when he met them. He then played along with their attempt to brainwash him, and later reveals to Basara why he felt they needed to be protected. He then sets out to uncover whatever the current demon lord and his faction were attempting.
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* GoodIsNotNice
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* GoodIsNotNiceGoodIsNotNice: Kills a god for attempting to harm Basara. Doesn't bat an eye either when he starts pleading for his life and claiming he was doing it for her.
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* PutOnABus: Shows up early on in the first few episodes of season 2's ''Burst''. He then disappears from the story for quite some time after Mio and the others enter the demon realm.
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-> Voiced by: Asami Tano
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-> Voiced by: Creator/KeijiFujiwara
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* {{Badass}}
to:
* {{Badass}}
{{Badass}}: Called the invincible "War God" by both allies and enemies. Out of all of his encounters as a hero in his prime, only ''one'' demon managed to survive a fight with him. He can also casually go toe to toe with the current Demon Lord with ease despite being years out of practice.
* SmokingIsCool: Frequently seen with a cigarette and the way he does it oozes class.
* SmokingIsCool: Frequently seen with a cigarette and the way he does it oozes class.
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!Tōjō Basara
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[[folder: Tōjō Household]]
!Basara Tōjō
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The son of [[OneManArmy Jin]] [[TheDreaded Basara]], Tōjō Basara was just starting life as a highschool student when he got word that he was going to have two new sisters[[note]] Which turned out to be a ruse[[/note]]. After setting things straight with them, he has become Mio's protector against the faction of demons who want to strip her of the power granted by her father, the former demon lord.
to:
The son of [[OneManArmy Jin]] [[TheDreaded Basara]], Tōjō]], Basara Tōjō Basara was just starting life as a highschool student when he got word that he was going to have two new sisters[[note]] Which turned out to be a ruse[[/note]]. After setting things straight with them, he has become Mio's protector against the faction of demons who want to strip her of the power granted by her father, the former demon lord.
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* ReiAyanamiExpy: Blue hair, yellow eyes, supernatural origins, stoic demeanour and SugarAndIcePersonality.
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* ReiAyanamiExpy: Blue hair, yellow eyes, supernatural origins, stoic demeanour demeanor and SugarAndIcePersonality.
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!Jin Tōjō
The father of Basara.
----
* {{Badass}}
[[/folder]]
[[folder: School]]
The father of Basara.
----
* {{Badass}}
[[/folder]]
[[folder: School]]
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!Nanao Tachibana
A student.
----
* DudeLooksLikeALady: Very much so.
* FriendlyNeighborhoodVampire: He is actually a vampire.
* HairDecorations: Wears a hairclip.
* {{Megane}}
[[/folder]]
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No spoilers in trope names
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* HotForStudent: At first it was subtle teasing... It escalates rather quickly.
* [[spoiler:IncestIsRelative]]: [[spoiler: Her affectiions for Basara were that of a teasing, barely older than him aunt that escalated rather quickly. It's implied between the lines that she may have had the same affections for her sister.]]
* [[spoiler:IncestIsRelative]]: [[spoiler: Her affectiions for Basara were that of a teasing, barely older than him aunt that escalated rather quickly. It's implied between the lines that she may have had the same affections for her sister.]]
to:
* HotForStudent: For Basara. At first it was subtle teasing... It escalates rather quickly.
*[[spoiler:IncestIsRelative]]: IncestIsRelative: [[spoiler: Her affectiions affections for Basara were that of a teasing, barely older than him aunt that escalated rather quickly. It's implied between the lines that she may have had the same affections for her sister.]]
*
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* [[spoiler:ViolentlyProtectiveGirlfriend]]: [[spoiler:Did not take Sakazaki or rather Ornish's attempt on Basara's life well.]]
to:
* [[spoiler:ViolentlyProtectiveGirlfriend]]: [[spoiler:Did ViolentlyProtectiveGirlfriend: Did not take Sakazaki [[spoiler:Sakazaki or rather Ornish's Ornish's]] attempt on Basara's life well.]]
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Added DiffLines:
* [[spoiler:IncestIsRelative]]: [[spoiler: Her affectiions for Basara were that of a teasing, barely older than him aunt that escalated rather quickly. It's implied between the lines that she may have had the same affections for her sister.]]
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* [[spoiler:ViolentlyProtectiveGirlfriend]]: [[spoiler:Did not take Sakazaki or rather Ornish's attempt on Basara's life well.]]
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!Basara Tōjō
to:
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* AccidentalPervert: He first meets Mio when he accidentally walks in on her in a restroom.
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Added DiffLines:
Character page for the light novel and anime series ''LightNovel/TheTestamentOfSisterNewDevil''.
!Basara Tōjō
->Voiced by: Creator/YuuichiNakamura
The son of [[OneManArmy Jin]] [[TheDreaded Basara]], Tōjō Basara was just starting life as a highschool student when he got word that he was going to have two new sisters[[note]] Which turned out to be a ruse[[/note]]. After setting things straight with them, he has become Mio's protector against the faction of demons who want to strip her of the power granted by her father, the former demon lord.
-----
* AboveTheInfluence: Basara played this straight at the beginning of the story, but with the onset of more women throwing themselves at him, his resistance is crumbling away...
* AfraidOfTheirOwnStrength: When he first used his power, he not only annihilated his target, but a good deal of the surrounding area as well. He had not used it since then until Maria and Mio both entered his life.
* BigBrotherInstinct: Invokes this full force when protecting Mio.
* ChickMagnet
* CoveredWithScars: Basara's body is covered in scars, which are quite visible as he has several on his arms. Both Maria and Mio quickly find out that he's actually quite a skilled fighter, and those scars are a testament to the training he's received.
* DarkAndTroubledPast: Accidentally killed several people when he initially awoke his "Banishing Shift". As a result, he and his father were exiled from their home. He's still haunted by it to this day.
* DeclarationOfProtection: Basara's top priority is protecting his new family.
* TheExile: Both himself and his father were excommunicated from their home village.
* FlirtyStepsiblings: With Mio.
* HiddenDepths: Maria notes that despite his nice demeanor, he has a hidden calling as a "sadistic brute". Best seen when he has to subjugate his servants or when his resistance crumbles away.
* MissingMom: His mother passed away a long time ago.
* NewTransferStudent: He transfers to Mio's school in order to stay closer to her and protect her against demons trying to kill her.
!Mio Naruse
-> Voiced by: Ayaka Asai
A young girl who happens to be the daughter of the former Demon Lord and holder of his power. She enters Basara's life as a new sister with the promise of her and Maria's mother to wed Basara's father.
-----
* ActionGirl
* AggressiveSubmissive: Acts very much "tsun" under normal circumstances, but becomes pretty submissive when her contract activates.
* ClingyJealousGirl: She really doesn't like to see Yuki's advances towards Basara.
* CurtainsMatchTheWindow: Red hair and red eyes.
* FieryRedhead
* FlirtyStepsiblings: With Basara.
* GirlishPigtails
* HairIntakes: The two "cat ears" that are part of her hairdo.
* HiddenBackupPrince: Mio learns she's the daughter of the demon king after he's killed off, and a hostile demon faction is intent on finding and killing her. He had her hidden away to live the life of a normal human up to that point. Once Basara also learns of this, he reconsiders having kicked them out of his house after they tried to brainwash him into leaving.
* LittleSisterHeroine: She's Basara's younger stepsister and a lot of tension and awkward situations between her and Basara.
* MsFanservice: Mio is often seen from low angles to show off her shapely body.
* ParentalAbandonment: Her foster parents died shortly before the beginning of the series. Her biological father is also dead.
* ReluctantFanserviceGirl: Frequently put in this position thanks to Maria and the Master-Slave contract.
* RapunzelHair: She has long crimson hair that reaches down to her waist.
* RedHeadedHeroine
* RedOniBlueOni: The red to Yuki's blue.
* {{Tsundere}}: She is prone to outbursts when faced with inappropriate situations such as finding erotic magazines underneath Basara's bed or being left at the mercy of Maria's succubus curse. Despite this, she is also caring and affectionate, genuinely appreciating Basara's kind treatment and protection.
* UnskilledButStrong: Mio inherited a tremendous amount of demonic power from her father, but she's been aware of it for less than a year and isn't particularly adept at using it.
* ZettaiRyouiki: Grade S; a twin-tailed {{Tsundere}} with thigh-high stockings.
!Maria Naruse
-> Voiced by: Creator/KaoriFukuhara
Mio's 'sister'/retainer.
-----
* ActionGirl
* ElegantGothicLolita: She usually wears a black frilly gothic lolita-style dress as her casual wear.
* TheGadfly: She likes teasing people no matter how serious the situation is.
* GirlishPigtails
* HimeCut: Befitting her ElegantGothicLolita attire.
* HornyDevils: Well, she ''is'' a succubus after all...
* MatchmakerCrush: Goes out of her way to have Basara and Mio do dirty stuff with each other. But she soon falls for Basara herself.
* MysticalWhiteHair: A succubus with white hair.
* OlderThanSheLooks: Maria claims to be an adult, and produces a fake id to show to cops in case she gets stopped on the street during school hours. However, Basara wonders how effective it'll be as she looks younger than him.
* PetitePride: Has no qualms or feelings of inferiority about her small bust. Granted, she can age up if she wants to, but she actually prefers her smaller form.
* PintSizedPowerhouse: She is a Power-type Brawler, according to Basara. [[spoiler:She can become even stronger if she unlocks her seal.]]
* PointyEars: She has them in her succubus form.
* ThePrankster: She has a penchant for pranks, which often gets her in trouble and results in Mio punishing her.
* PurpleEyes: Her eyes are purple and she's a succubus.
* SecretKeeper: Keeps several from Basara and even a few from Mio.
* SexierAlterEgo: She can transform into a grown, curvy woman that is an extreme opposite of her loli form.
* {{Stripperiffic}}: She wears a very revealing outfit in her succubus form.
* TheTease: Being a succubus, Maria naturally likes to tease Basara and she also enjoys getting him in perverted situations.
* TokenMiniMoe: The youngest-looking character in the main cast.
* {{Underboobs}}: The outfit of her succubus form leaves the undersides of her breasts exposed.
* ZettaiRyouiki: Grade A in her succubus form.
!Yuki Nonaka
-> Voiced by: Creator/SarahEmiBridcutt
Basara's childhood friend who hails from the Hero Tribe. She is in love with Basara and often butts heads with Mio over his affections. She is one of the observers watching Mio.
-----
* ActionGirl
* ChildhoodFriendRomance: She is in love with her childhood friend Basara.
* ClassRepresentative: She's the representative of her and Mio's class.
* ClingyJealousGirl: Whenever she finds out that Basara did something perverted with Mio, she'll often try to have him do the same thing to her.
* ForgottenFirstMeeting: The first thing Yuki does when introduced to Basara after he transfers to her and Mio's school is to give him TheGlomp. In front of the entire class and Mio. She then reminds him of who she was, and he then vaguely remembers her.
* HairDecorations: She wears a white hairband.
* IdiotHair: She has a long cowlick that stands prominently atop her head.
* KansaiRegionalAccent: She speaks with an Osaka dialect.
* MagicKnight: As a part of the Hero Tribe, Yuki is able to summon a spirit sword and manipulate the weapons energy to form armor around her limbs.
* RedOniBlueOni: The blue to Mio's red.
* ReiAyanamiExpy: Blue hair, yellow eyes, supernatural origins, stoic demeanour and SugarAndIcePersonality.
* ShamelessFanserviceGirl: Is very forward and often tries to seduce Basara.
* ShyBlueHairedGirl: Blue-haired and relatively serious and reserved, though very flirty around Basara.
* TheStoic
* SugarAndIcePersonality: Yuki is usually calm, serious and reserved. However, whenever she's around Basara she becomes affectionate and flirty.
* SupernaturalGoldEyes: Her eyes are yellow, a hint that she's a member of the Hero Tribe that opposes Demons.
* YouGottaHaveBlueHair: She has light blue hair.
!Chisato Hasegawa
-> Voiced by: Creator/YuuAsakawa
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to him, even when he purposefully kept her in the dark about his dealing with demons and the heroes, was always spot-on. Later on, it becomes apparent that she has much more than a passing interest in the young Basara.
-----
* BeautyMark: She has one under her left eye.
* CoolBigSis: How Basara sees her.
* GoodIsNotNice
* HairAntennae: She has two strands of hair that stick up from the top of the head like an antennae.
* HiddenDepths: There's a lot more to Chisato than meets the eye.
* HotForStudent: At first it was subtle teasing... It escalates rather quickly.
* LongLostRelative: [[spoiler: She is Basara's aunt, and his mother's sister.]]
* {{Meganekko}}
* RapunzelHair: She has hip-length hair.
* ReasonableAuthorityFigure
* SchoolNurse: The school's on-call nurse and [[HelloNurse one of its most beautiful people]].
* ShamelessFanserviceGirl: In the OVA, showing more forwardness than Yuki. And that's saying something.
* ShesGotLegs
* TheTease
* ZettaiRyouiki: She wears thigh-high stockings.
!Basara Tōjō
->Voiced by: Creator/YuuichiNakamura
The son of [[OneManArmy Jin]] [[TheDreaded Basara]], Tōjō Basara was just starting life as a highschool student when he got word that he was going to have two new sisters[[note]] Which turned out to be a ruse[[/note]]. After setting things straight with them, he has become Mio's protector against the faction of demons who want to strip her of the power granted by her father, the former demon lord.
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* AboveTheInfluence: Basara played this straight at the beginning of the story, but with the onset of more women throwing themselves at him, his resistance is crumbling away...
* AfraidOfTheirOwnStrength: When he first used his power, he not only annihilated his target, but a good deal of the surrounding area as well. He had not used it since then until Maria and Mio both entered his life.
* BigBrotherInstinct: Invokes this full force when protecting Mio.
* ChickMagnet
* CoveredWithScars: Basara's body is covered in scars, which are quite visible as he has several on his arms. Both Maria and Mio quickly find out that he's actually quite a skilled fighter, and those scars are a testament to the training he's received.
* DarkAndTroubledPast: Accidentally killed several people when he initially awoke his "Banishing Shift". As a result, he and his father were exiled from their home. He's still haunted by it to this day.
* DeclarationOfProtection: Basara's top priority is protecting his new family.
* TheExile: Both himself and his father were excommunicated from their home village.
* FlirtyStepsiblings: With Mio.
* HiddenDepths: Maria notes that despite his nice demeanor, he has a hidden calling as a "sadistic brute". Best seen when he has to subjugate his servants or when his resistance crumbles away.
* MissingMom: His mother passed away a long time ago.
* NewTransferStudent: He transfers to Mio's school in order to stay closer to her and protect her against demons trying to kill her.
!Mio Naruse
-> Voiced by: Ayaka Asai
A young girl who happens to be the daughter of the former Demon Lord and holder of his power. She enters Basara's life as a new sister with the promise of her and Maria's mother to wed Basara's father.
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* ActionGirl
* AggressiveSubmissive: Acts very much "tsun" under normal circumstances, but becomes pretty submissive when her contract activates.
* ClingyJealousGirl: She really doesn't like to see Yuki's advances towards Basara.
* CurtainsMatchTheWindow: Red hair and red eyes.
* FieryRedhead
* FlirtyStepsiblings: With Basara.
* GirlishPigtails
* HairIntakes: The two "cat ears" that are part of her hairdo.
* HiddenBackupPrince: Mio learns she's the daughter of the demon king after he's killed off, and a hostile demon faction is intent on finding and killing her. He had her hidden away to live the life of a normal human up to that point. Once Basara also learns of this, he reconsiders having kicked them out of his house after they tried to brainwash him into leaving.
* LittleSisterHeroine: She's Basara's younger stepsister and a lot of tension and awkward situations between her and Basara.
* MsFanservice: Mio is often seen from low angles to show off her shapely body.
* ParentalAbandonment: Her foster parents died shortly before the beginning of the series. Her biological father is also dead.
* ReluctantFanserviceGirl: Frequently put in this position thanks to Maria and the Master-Slave contract.
* RapunzelHair: She has long crimson hair that reaches down to her waist.
* RedHeadedHeroine
* RedOniBlueOni: The red to Yuki's blue.
* {{Tsundere}}: She is prone to outbursts when faced with inappropriate situations such as finding erotic magazines underneath Basara's bed or being left at the mercy of Maria's succubus curse. Despite this, she is also caring and affectionate, genuinely appreciating Basara's kind treatment and protection.
* UnskilledButStrong: Mio inherited a tremendous amount of demonic power from her father, but she's been aware of it for less than a year and isn't particularly adept at using it.
* ZettaiRyouiki: Grade S; a twin-tailed {{Tsundere}} with thigh-high stockings.
!Maria Naruse
-> Voiced by: Creator/KaoriFukuhara
Mio's 'sister'/retainer.
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* ActionGirl
* ElegantGothicLolita: She usually wears a black frilly gothic lolita-style dress as her casual wear.
* TheGadfly: She likes teasing people no matter how serious the situation is.
* GirlishPigtails
* HimeCut: Befitting her ElegantGothicLolita attire.
* HornyDevils: Well, she ''is'' a succubus after all...
* MatchmakerCrush: Goes out of her way to have Basara and Mio do dirty stuff with each other. But she soon falls for Basara herself.
* MysticalWhiteHair: A succubus with white hair.
* OlderThanSheLooks: Maria claims to be an adult, and produces a fake id to show to cops in case she gets stopped on the street during school hours. However, Basara wonders how effective it'll be as she looks younger than him.
* PetitePride: Has no qualms or feelings of inferiority about her small bust. Granted, she can age up if she wants to, but she actually prefers her smaller form.
* PintSizedPowerhouse: She is a Power-type Brawler, according to Basara. [[spoiler:She can become even stronger if she unlocks her seal.]]
* PointyEars: She has them in her succubus form.
* ThePrankster: She has a penchant for pranks, which often gets her in trouble and results in Mio punishing her.
* PurpleEyes: Her eyes are purple and she's a succubus.
* SecretKeeper: Keeps several from Basara and even a few from Mio.
* SexierAlterEgo: She can transform into a grown, curvy woman that is an extreme opposite of her loli form.
* {{Stripperiffic}}: She wears a very revealing outfit in her succubus form.
* TheTease: Being a succubus, Maria naturally likes to tease Basara and she also enjoys getting him in perverted situations.
* TokenMiniMoe: The youngest-looking character in the main cast.
* {{Underboobs}}: The outfit of her succubus form leaves the undersides of her breasts exposed.
* ZettaiRyouiki: Grade A in her succubus form.
!Yuki Nonaka
-> Voiced by: Creator/SarahEmiBridcutt
Basara's childhood friend who hails from the Hero Tribe. She is in love with Basara and often butts heads with Mio over his affections. She is one of the observers watching Mio.
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* ActionGirl
* ChildhoodFriendRomance: She is in love with her childhood friend Basara.
* ClassRepresentative: She's the representative of her and Mio's class.
* ClingyJealousGirl: Whenever she finds out that Basara did something perverted with Mio, she'll often try to have him do the same thing to her.
* ForgottenFirstMeeting: The first thing Yuki does when introduced to Basara after he transfers to her and Mio's school is to give him TheGlomp. In front of the entire class and Mio. She then reminds him of who she was, and he then vaguely remembers her.
* HairDecorations: She wears a white hairband.
* IdiotHair: She has a long cowlick that stands prominently atop her head.
* KansaiRegionalAccent: She speaks with an Osaka dialect.
* MagicKnight: As a part of the Hero Tribe, Yuki is able to summon a spirit sword and manipulate the weapons energy to form armor around her limbs.
* RedOniBlueOni: The blue to Mio's red.
* ReiAyanamiExpy: Blue hair, yellow eyes, supernatural origins, stoic demeanour and SugarAndIcePersonality.
* ShamelessFanserviceGirl: Is very forward and often tries to seduce Basara.
* ShyBlueHairedGirl: Blue-haired and relatively serious and reserved, though very flirty around Basara.
* TheStoic
* SugarAndIcePersonality: Yuki is usually calm, serious and reserved. However, whenever she's around Basara she becomes affectionate and flirty.
* SupernaturalGoldEyes: Her eyes are yellow, a hint that she's a member of the Hero Tribe that opposes Demons.
* YouGottaHaveBlueHair: She has light blue hair.
!Chisato Hasegawa
-> Voiced by: Creator/YuuAsakawa
The extremely beautiful school nurse, Hasegawa-sensei had kept a distant eye and a friendly ear for Basara. Her advice to him, even when he purposefully kept her in the dark about his dealing with demons and the heroes, was always spot-on. Later on, it becomes apparent that she has much more than a passing interest in the young Basara.
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* BeautyMark: She has one under her left eye.
* CoolBigSis: How Basara sees her.
* GoodIsNotNice
* HairAntennae: She has two strands of hair that stick up from the top of the head like an antennae.
* HiddenDepths: There's a lot more to Chisato than meets the eye.
* HotForStudent: At first it was subtle teasing... It escalates rather quickly.
* LongLostRelative: [[spoiler: She is Basara's aunt, and his mother's sister.]]
* {{Meganekko}}
* RapunzelHair: She has hip-length hair.
* ReasonableAuthorityFigure
* SchoolNurse: The school's on-call nurse and [[HelloNurse one of its most beautiful people]].
* ShamelessFanserviceGirl: In the OVA, showing more forwardness than Yuki. And that's saying something.
* ShesGotLegs
* TheTease
* ZettaiRyouiki: She wears thigh-high stockings.
