The biggest idiot in the world (according to the majority of the cast) and somehow the main protagonist. Though a consistent failure in tests, his one major advantage is that this gives his Summoned Being a special ability to interact with physical objects and dodge attacks by other Beings. Unfortunately, this also causes him to be drafted by various teachers to do their grunt work. Currently lives on his own due to his parents' overseas work and his sister studying in Harvard (though she later came back), and usually has meals consisting of water and condiments due to his habit of spending what little allowance he gets on video games.
Acquired Poison Immunity: Later in the novels Akihisa can survive Himeji's cooking due to spending summer eating his sister Akira's.
Amusing Injuries: Applied to by mostly Minami, sometimes others like Miharu, Yuuko, or indirectly Himeji.
Badass Adorable: He's very capable of kicking your ass outside Summoned Being battles. Just ask those two senior jerks who insulted Class F's Maid Cafe — and he did it while dressed as a Meido.
Clueless Chick Magnet: Good God, yes. He may be forgiven for misunderstanding Minami's feelings (given her attitude), but remaining clueless to Mizuki's more overt advances is just ridiculous.
Crouching Moron, Hidden Badass: Slowly turns to this in the light novel and manga, and is hinted to be turning into one at the end of the first anime season. After all, the reason the bracelet broke in the first place was because Akihisa was no longer an "idiot".
Fragile Speedster: His Summoned Being in the manga version, as well as the penultimate episode of the first season.
Good Angel, Bad Angel: He calls upon these two on occasion to weigh the outcomes and make the decision.
Guilty Pleasure: In the manga, he admits to himself that he cannot help but buy video games and manga even if they consume a very large portion of what little allowance he has.
Hidden Depths: Is a superb cook. Has also shown that he can be fairly smart if he actually puts effort into studying.
I Am Not Right-Handed: Subverted — he believed he could win a Summoned Being battle because nobody knows he's actually left-handed. The result was less than optimal.
Hypocritical Humor: He keeps telling Yuuji to take notice of Shouko already. Despite the fact he can't notice two girls liking him.
Idiot Hero: Dear God, yes. Though he starts to grow out of his idiocies over time.
If It's You, It's Okay: Apparently thinks homosexuality is wrong (and initially didn't even believe it was real), yet has no problem with confessing to Hideyoshi, buying fanservicey pictures of him from Kouta, or getting a nosebleed from seeing him topless. He frequently mistakes him as one of the two token girls in class together with Mizuki, although at times he also considers Minami as one. At other times he ignores Hideyoshi's true gender altogether.
In the light novels he does acknowledge that Hideyoshi is a guy, but for some reason treats him as a girl anyway. An offhand remark in volume 8 even confirms that, yeah, he feels it is okay if it’s Hideyoshi.
Indy Ploy: Despite his Too Dumb to Live tendencies he is very good at coming up with good tactics on the fly.
Meaningful Name: Yoshii means "righteous"/"good"/"good luck" (the first two definitely apply to Akihisa; the latter is the total opposite of his life, unless one counts his Unwanted Harem).
Mundane Utility: His special Summoned Being is like a part of him. His teachers make good use of this — penalty in the form of boring chores.
Nice Guys Finish Last: He's one of the nicest guys you can meet (depending on who you ask), and because of it, practically everything he has done backfires on him. Although it has its benefits.
Oblivious to Love: Because he's an Idiot Hero, even Mizuki's more overt romantic advances don't translate correctly to him.
It should be noted that in the light novels, the possibility of Mizuki and Minami liking him has crossed his mind before. It's just that he usually dismisses it as a delusion, believing they couldn't like someone like him.
Perpetual Poverty: 1/64th cup ramen cuts as lunch, salt water (main course) with sugar water (side dish) meals and cold water showers are some of the miseries caused by how broke he is.
Power Perversion Potential: Since his summon can interact with the real world, it can do something ecchi things take photos of girls in the baths or such. Subverted in two ways, first he has to have a summon field and second if he can summon so can the people he's peeping on which leads to...pain.
Shipper on Deck: Actively encourages the Yuuji/Shouko pairing.
Supreme Chef: He's responsible for preparing the meals in his home. Gourmet-class meals, in fact.
It has been discussed that he can launch a professional career with that sort of talent.
Synchronization — Being the "Punishment Inspector", ostensibly meaning he inspects how effective punishments are firsthand, his Summoned Being is the only one that can become tangible, and he feels whatever it feels.
Too Dumb to Live: All the time. One extreme case is spending most of what little allowance he has on video games instead of food.
The best one has to be he's a member of the FFF, guys who can't get girls and will kill anyone who does including their own. Akihisa also happens to be ranked first rate inquisitor and is the Chick Magnet...get some popcorn
Unknown Rival: Shouko considers him a rival for Yuuji's heart. As usual, he's oblivious.
Your Approval Fills Me with Shame: Mizuki and Minami think he's cute in girl's clothing. Even Hideyoshi thinks so. He doesn't take these compliments very well.
Yuuji Sakamoto
Voiced by:Tatsuhisa Suzuki (Japanese) and Scott Freeman (English)
Self-appointed Representative of Class F and a close friend of Akihisa. Despite his low grades, he's quite the brilliant tactician and strategist, and always thinks up of plans to beat enemy classes.
Almighty Janitor: In the manga and light novels it's shown that when he does study he makes for a Class B-caliber student.
Hot Mom: He has one, note this picture was during his earlier years so...
I Will Protect Her: He won't admit it, but he did this for Shouko. He pulled a Big Damn Heroes moment to save Shouko from 3 boys who tried to bully her after she tried to stop them from writing some vicious lies on his PE clothing; he tried to come up with an excuse not to help, but in the end saves her. Although he tries to pass it off as nothing, Shouko is really touched by that action that she vows to his mother to marry him someday.
Knight in Shining Armor: Played with. It was part of his scheme to get back at two senior jerks who made fun of his class's Maid Cafe in the OVA. However, the first time he did it for Akihisa was played straight.
Marshmallow Hell: From Shouko in episode 4 of Ni. She does this to Yuuji to confirm once and for all whether or not he really doesn't find her attractive. Though Yuuji feebly denies he is enjoying it, his Summon leaping for joy (the upgraded Summons speak and reveal their summoners' thoughts and repressed feelings) reveals that Shouko's physical charms are not lost on him.
Throw the Dog a Bone: Even if Class F wins a Summoned Being battle, Yuuji declines to penalize the losing Class with room exchange. He also has his own reasons — as he confided to Akihisa, he doesn't want his classmates to become complacent, at least not until they beat Class A.
Zerg Rush: Some of his plans thus far include sending more troops if the first few don't work, such as in Episode 12 of the anime and the 5th to 7th episodes of Ni! (Volume 3 of the light novel).
Mizuki Himeji
Voiced by: Hitomi Harada (Japanese) and Alexis Tipton (English)
One of the smartest students in Fumizuki, who got stuck in Class F after missing the placement exam due to a freak fever and thus automatically scored a zero. She's the meat shield that keeps Class F afloat in a Summoned Being battle. She has a crush on Akihisa, though he doesn't seem to notice, and tries to win him over with her cooking, but one bite is all it took to cause all her classmates to fear her dishes.
Her Summoned Being in the latter half of Ni!'s fourth episode tried to uncover her perversion.
Also this from volume 7 of the novel:
Mizuki: I think Minami-chan will use this chance to touch Akihisa-kun's chest and butt...that's too sneaky...”
Minami: Wh, what are you saying, Mizuki! How can I do such a thing—eh, what? What did you just say? Touching...Mizuki, what were you talking about...”
Mizuki: Ah! No, nothing! I'm not talking about touching him sneakily. Th, that... I'm just talking about improving the relationship with Akihisa-kun. I just said it wrongly!”
Minami: Mizuki..what were you planning to do to Aki...”
Does Not Know Her Own Strength: As the one of the highest scores in school Himeji has a bit of trouble dealing with slightly more delicate tasks like Summoner baseball. Her pitches took out members of both her team and opponents. Adding to this she can't aim well....
); for those not up on their inorganic chemistry, "King's Water" is called as such because it is one of the few solvents that can dissolve solid gold.]]...
Yamato Nadeshiko: Like with Shouko its played with. She doesn't have the traditional look but her personality is closer to the tradition and she likes cooking her guy food. It might actually taste good if she taste tested it.
The other known female student in Class F. She spent most of her life in Germany, making her bad at reading kanji despite being fairly intelligent. Like Mizuki, she also has a crush on Akihisa — which she expresses by literally crushing him with wrestling moves whenever he misreads her intentions, which is quite often.
A-Cup Angst: She has a complex from her small bust size.
Everybody Hates Mathematics: Inverted — math is the only subject she does well. Justified in that spending most of her life in Germany made her forget kanji, making every other subject nigh-impossible to understand.
A student with a talent for acting, whose extremely effeminate looks caused characters and audiences alike to question their sexuality. Everybody frequently mistakes him for a girl despite his insistence to the contrary, was considered by Mizuki and Minami as a rival for Akihisa's affection, occasionally gets confessed to by Akihisa, has a separate space reserved for him in dressing rooms, and keeps getting female roles and costumes from the Drama Department. The only person who considers him a guy is Akihisa's sister Akira — only because she didn't expect him to have any female friends. He has difficulty studying serious subjects, and is pretty much the opposite of his twin sister Yuuko, who happens to be in Class A.
A Friend in Need: He joins in the antics of the others probably because its what friend's do, although its still a mystery how he can get away from the consequences when it goes downhill.
Ambiguous Gender: In-series, though he frequently insists he's a boy.
Antiquated Linguistics: Speaks mainly in like an old man(ancient japanese and all), but thats only in japanese language. In the english dub...not so much.
Beneath the Mask: Deep down, Hideyoshi isn't all that different from the others in class F. Also he really does likes Akihisa (romantically).
Berserk Button: He really hates it when people sell him female clothing when he asks for male ones, as well when he wears male clothing and people make him switch to female ones.
Butt Monkey: Not as bad as Akihisa, but no one will ever call him a guy on first glance, even when he insists otherwise. This obviously has caused him a bit of trouble in "I'm a guy" situations.
Catch Phrase: More or less "I'm a Guy", when he does or uses into non-female related things, and someone asks him why he did so.
Dude Looks Like a Lady: To the point that EVERYONE mistakes him for a girl and very little know that he is actually a guy despite him saying that he is a guy. He even has his own exclusive bath house room just because of this.
Easily Forgiven: Due to his appearance and personality, he was the only boy to escape "punishment" by the girls during the Study Camp arc (Volume 3 light novels, Episodes 5 to 7 of Ni!).
If It's You, It's Okay: May actually be the case towards Akihisa as of the later novels.
To a lesser extent, some of the non-yaoi in the fandom actually think Hideyoshi is the best one for Akihisa. As he is the only one of the other love interests who hasn't harm/humiliate Akihisa in anyway.
Japanese Pronouns: In Japanese, his way of speech is quite antiquate and definitely not what a young person would use. To match with it, he refers to himself with "washi", the pronoun old men use.
Most likely a joke on his name: He shares his first name with Toyotomi Hideyoshi, the second unifier of Sengoku-era Japan, and his surname was taken from the surname of Toyotomi's alias when he was younger.
Of course, why one of the greatest traps in anime should be named after the man whose title gave English the word "tycoon" is a mystery known only to his creator.
Luminescent Blush: Like all of the other love interests of Akihisa, he is prone to this.
Sibling Yin-Yang: With Yuuko — he is not too smart but kind; she is smart but haughty.
Sleep Cute: So cute Akihisa tried to kiss him once; it was even lampshaded in the novels. Of course he does look cute without his hair clips.
So Beautiful, It's a Curse: He's so beautiful no one believes him to be a guy, and gets confessions from guys just about everyday. invoked Then there's the poem a certain someone wrote to him which kind of gave him nightmares for a while.
The Stoic: Not quite, but most people say he has a good poker face. Quite good considering how many confessions he gets from other guys.
A friend of Akihisa and pervert par excellence who is almost never seen without a camera on hand. Whenever he sees a potential panty/boob shot, he'll squeeze into whatever angle necessary for the best shot, and sells them for some cash. Akihisa seems especially interested whenever he takes a photo of Hideyoshi in a sexy pose. He also turns out to be an excellent athlete, with Health and P.E. grades to rival even those of Class A, but is terrible at all other subjects.
Friend In The Black Market: Want fan servicy pictures of say Hideoyshi or Akihisa in girl's clothing? Well Mutsurini can get you what you want...for a price.
Highly Visible Ninja: He should be wearing army urban camouflage instead of his trademark ninja clothes if he really wants to blend into the environment. Same goes for his Summoned Being.
A group consisting of the majority of male students within Class F, often seen wearing dark robes and hodes that hide their features. Since none of them have luck with girls, they formed a pact to hunt down anyone in their class who did. If they find a guy in Class 2-F winning affection from a girl, they will perform an Inquisition upon him. Even Akihisa has donned their robe at times (when he isn't a target).The only named student to be a part of this group is Ryo Sugawa.
Ax Crazy: To uphold their dateless status, they use, among a list of weapons, axes.
Voiced by: Tomomi Isamura (Japanese) and Jamie Marchi (English)
The soft-spoken, if assertive, Class Representative of 2-A. She was Yuuji's childhood friend, and now dreams of marrying him... whether he likes it or not.
To a scary degree— she pokes his eyes until they're sore so he doesn't look at other girls. She tries to rape him, breaks into his house, and tries to kill himtwice. Once when she thinks that he said "Himeji's more my type than Shouko. And she's got bigger boobs too!" (he didn't). Then when she tries to drown him so she can give him CPR. No one bats an eye...yeah.
Fridge Brilliance: Why should they, since no one ever complained about the constant abuse Akihisa suffers from on a regular basis?
Mistaken for Lesbian: Because she is crazily in love with Yuuji she rejects all men who want to go out with her, which initially created the impression to others that she is a lesbian.
Rescue Romance: The real reason why Shouko is so obsessed with Yuuji. He pulled a Big Damn Heroes moment to save Shouko from 3 boys who tried to bully her after she tried to stop them from writing some vicious lies on his PE clothing; he tried to come up with an excuse not to help, but in the end saves her. Although he tries to pass it off as nothing, Shouko is really touched by that action that she vows to his mother to marry him someday.
Woman Scorned: Played with in-universe, Shouko consider Yuuji cheating if he is near/talking/running from any girl (or Hideyoshi). As well she thinks he's a bit too friendly with Akihisa.
Yamato Nadeshiko: Has the looks with her dark hair and almostHime Cut as well as the intense desire to be a wife. She varies slightly in the uses a katana instead of a naginata in battle. She varies even more with the restof her personality.
Yandere: She will do anything to have Yuuji. This goes both ways.
Voiced by: Yoshino Nanjou (Japanese) and Trina Nishimura (English)
A green-haired girl and a bit of a troublemaker who might be Kouta's equal in terms of Health and P.E., except she adds that she has "practical" experience in that area.
Ascended Extra/Recurring Extra: Depending on which part of the story, but she plays a role here or there giving minor hints to the arc. But most of the time she just likes to tease and watch the guys get into trouble.
Voiced by: Takuma Terashima (Japanese) and Joel McDonald (English)
A calm, collected boy who usually sticks to a tight schedule and has very good grades as a result. However, after a small misunderstanding, he thought Akihisa was trying to hit on him, and now happens to have a crush on Akihisa.
Hideyoshi's twin sister. Unlike him, she is prideful, haughty and pretty arrogant, but has the grades to back it up.
A-Cup Angst: She might have a bit of an issue with her breasts, which Akihisa kind of pointed when she put him into a wrestling move disguised as Hideyoshi... It's a Long Story.
Abuse Is Okay When It Is Female on Male: She's the only one who hurts Hideyoshi in the light novels. Compare what she does to him like what Minami does to Akihisa.
Berserk Button: Turns out Yuuko might have a thing about her weight, and oddly enough Hideyoshi points this out to her when he dressed up as her. Her skirt is a bit loose around his waist.
I Can Explain: This type of trope pops up whenever Hideyoshi starts cosplaying, and people mistake him for her. Needless to say she gets pissed and starts breaking his joints.
Voiced by: Hiromu Miyazaki (Japanese) and Todd Haberkorn (English)
A cunning schemer and Class Representative of Class B who's willing to cheat his way to victory and good grades. He tried forming an alliance with Class C, only to be defeated by Yuuji and his own plan, forcing the poor guy to get dressed in female clothing and get photographed by Yuuji as leverage to force his class into fighting Class A.
Humiliation Conga: Not only is he defeated by 2-C — or, to be more exact, Out Gambitted by Yuuji — but he was also forced by Yuuji to get photographed wearing female clothing as blackmail material to force him and 2-B to fight 2-A.
Freudian Excuse: Sort of hinted at in the light novels. She declares that her father should be the first one to disappear before all other men. Yoshi then notes that she looked like she "recalled something repulsive" and wondered if something might have happened.
Psycho Lesbian: Miharu's solution to anyone between her and Minami is to remove the problem. Especially Akihisa.
Class 2-E
Hiromi Nakabayashi
Voiced by: Yuko Takayama (Japanese) and Anastasia Munoz (English)
Class Representative of Class E and a natural athlete. Though she has bad grades, her athletic talent gives her greater endurance. Her summoned Being appears in the form of a basketball player.
A hardcore master of discipline who possesses great physical ability and serves as the current homeroom teacher of 2-F. He is the one who drags students off to remedial lessons if their Being gets KO'd in battle. Whatever the time, place, number of students or even relevance to school, he will pop up and drag them all back for those lessons.
Badass Normal: He can take on Akihisa's Summoned Being and win, despite its ability to interact with physical objects.
Big Damn Heroes: In the first season in episode 12 when Himeji, Akihisa, and Minami are about to fall he catches them and lifts the chain up through the sky.
Genius Bruiser: Can fight all boys of class F and has the second highest score of the 2nd year teachers(the class A teacher Takahashi has the highest score)
Shotacon: Being an adult woman who uses grades who get boys for dates, she may as well be.
Other Characters
Hazuki Shimada
Voiced by: Mana Hirata (Japanese) and Lindsay Seidel (English)
Minami's little sister who refers to Akihisa as "baka na onii-chan" ("stupid brother"), and talks about marrying him one day after he saved up money to buy her a giant stuffed doll.
Because You Were Nice to Me: The reason she likes Akihisa is because he went out of his way to buy her a 25,000-yen doll.
Innocent Innuendo: Anything she says and/or does can be easily misconstrued.
She claims she gave her First Kiss to Akihisa (to the cheek, at least) — cue Death Glares from the FFF and a beating from Minami, with some assistance from Mizuki.
In the School Festival arc she decided to go full-out instead of letting the guys surrender.
Voiced by:Kikuko Inoue (Japanese) and Carli Mosier (English)
Akihisa's 23-year-old sister with a bust that rivals Mizuki's. She studied at Harvard, but comes back to Japan later in the story to look after Akihisa. Considering some of her dialogue, it's possible that she has a brother complex or is just very good at teasing him in order to get him to do better. Unlike her brother, she's very smart, but bad at cooking.
The biggest idiot in the world (according to the majority of the cast) and somehow the main protagonist. Though a consistent failure in tests, his one major advantage is that this gives his Summoned Being a special ability to interact with physical objects and dodge attacks by other Beings. Unfortunately, this also causes him to be drafted by various teachers to do their grunt work. Currently lives on his own due to his parents' overseas work and his sister studying in Harvard (though she later came back), and usually has meals consisting of water and condiments due to his habit of spending what little allowance he gets on video games.
Self-appointed Representative of Class F and a close friend of Akihisa. Despite his low grades, he's quite the brilliant tactician and strategist, and always thinks up of plans to beat enemy classes.
One of the smartest students in Fumizuki, who got stuck in Class F after missing the placement exam due to a freak fever and thus automatically scored a zero. She's the meat shield that keeps Class F afloat in a Summoned Being battle. She has a crush on Akihisa, though he doesn't seem to notice, and tries to win him over with her cooking, but one bite is all it took to cause all her classmates to fear her dishes.
The other known female student in Class F. She spent most of her life in Germany, making her bad at reading kanji despite being fairly intelligent. Like Mizuki, she also has a crush on Akihisa — which she expresses by literally crushing him with wrestling moves whenever he misreads her intentions, which is quite often.
A student with a talent for acting, whose extremely effeminate looks caused characters and audiences alike to question their sexuality. Everybody frequently mistakes him for a girl despite his insistence to the contrary, was considered by Mizuki and Minami as a rival for Akihisa's affection, occasionally gets confessed to by Akihisa, has a separate space reserved for him in dressing rooms, and keeps getting female roles and costumes from the Drama Department. The only person who considers him a guy is Akihisa's sister Akira — only because she didn't expect him to have any female friends. He has difficulty studying serious subjects, and is pretty much the opposite of his twin sister Yuuko, who happens to be in Class A.
A friend of Akihisa and pervert par excellence who is almost never seen without a camera on hand. Whenever he sees a potential panty/boob shot, he'll squeeze into whatever angle necessary for the best shot, and sells them for some cash. Akihisa seems especially interested whenever he takes a photo of Hideyoshi in a sexy pose. He also turns out to be an excellent athlete, with Health and P.E. grades to rival even those of Class A, but is terrible at all other subjects.
A group consisting of the majority of male students within Class F, often seen wearing dark robes and hodes that hide their features. Since none of them have luck with girls, they formed a pact to hunt down anyone in their class who did. If they find a guy in Class 2-F winning affection from a girl, they will perform an Inquisition upon him. Even Akihisa has donned their robe at times (when he isn't a target).The only named student to be a part of this group is Ryo Sugawa.
The soft-spoken, if assertive, Class Representative of 2-A. She was Yuuji's childhood friend, and now dreams of marrying him... whether he likes it or not.
A green-haired girl and a bit of a troublemaker who might be Kouta's equal in terms of Health and P.E., except she adds that she has "practical" experience in that area.
A calm, collected boy who usually sticks to a tight schedule and has very good grades as a result. However, after a small misunderstanding, he thought Akihisa was trying to hit on him, and now happens to have a crush on Akihisa.
Hideyoshi's twin sister. Unlike him, she is prideful, haughty and pretty arrogant, but has the grades to back it up.
A cunning schemer and Class Representative of Class B who's willing to cheat his way to victory and good grades. He tried forming an alliance with Class C, only to be defeated by Yuuji and his own plan, forcing the poor guy to get dressed in female clothing and get photographed by Yuuji as leverage to force his class into fighting Class A.
Class C's Class Representative who was originally going out with Class B's Kyouji, until she saw him Dragged Into Drag.
A lesbian who is madly in love with Minami, even if that love is unrequited.
The old principal of Fumizuki High. Her name is never directly mentioned in the anime.
A soft-spoken teacher who used to be 1-F's homeroom teacher, but later became the narrator after being replaced by Nishimura-sensei.
A hardcore master of discipline who possesses great physical ability and serves as the current homeroom teacher of 2-F. He is the one who drags students off to remedial lessons if their Being gets KO'd in battle. Whatever the time, place, number of students or even relevance to school, he will pop up and drag them all back for those lessons.
Minami's little sister who refers to Akihisa as "baka na onii-chan" ("stupid brother"), and talks about marrying him one day after he saved up money to buy her a giant stuffed doll.
Akihisa's 23-year-old sister with a bust that rivals Mizuki's. She studied at Harvard, but comes back to Japan later in the story to look after Akihisa. Considering some of her dialogue, it's possible that she has a brother complex or is just very good at teasing him in order to get him to do better. Unlike her brother, she's very smart, but bad at cooking.
