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.
Crippling Overspecialization: Graduates from the idiot of all idiots to this as the series goes on, where he can go toe-to-toe with potentially stronger opponents if the match is held using a History subject.
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".
Deadly Dodging: His summon has to do this or die because its so weak breathing on it might even take it down.
Determinator: He might be an idiot, but he'll do his darndest best if he wants to, especially if it involves Mizuki. Down to even studying for an exam just so he can get his grades up for the next summoning battle.
Fragile Speedster: His Summoned Being in the manga version, as well as the penultimate episode of the first season.
Averted later in the series if the battle is in a History subject. Akihisa still keeps his speed and control over his Summoned Being, but he's not as fragile there as he is everywhere else, and he can potentially go toe-to-toe with students much stronger than himself in the subject because of the god control he sports over his Summon.
Gibberish of Love: Sometimes a cause of him in getting into trouble with the two girls. One particularly hilarious example is when he got invited to Kirishima's place to study with the gang. He saw Mizuki sporting a ponytail, which caught him by surprise so much he wanted to say "Himeji's so cute today, that my mind is about to explode just looking at you!" He instead said "Himeji's so dead today!"
Hidden Depths: Is a superb cook. Has also shown that he can be fairly smart if he actually puts effort into studying.
Hypocritical Humor: He keeps telling Yuuji to take notice of Shouko already. Despite the fact he can't notice two girls liking him.
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. Funnily, the outcome of the battle leads said opponent to underestimate him when they battle six months later in a Japanese History match later on in Volume 10.
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.
As of Volume 10, Akihisa finally admitted that Hideyoshi is "cool".
Limit Break: His summon has one. He smashes the ground with his wooden sword, breaking the scenery. The enemy summon is then engulfed with light, suspending him and draining his points. He then running towards the enemy, unleashing a flurry of attacks and slashes, sending the enemy flying.
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.
The ironic thing is he is oblivious to Mizuki's romantic advances on him despite the fact that he has a crush on her. Instead, she thinks that Mizuki has a crush on Yuji.
Akihisa is also is the only one of the guys who is oblivious to Kubo's feelings for 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.
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
Second was when Class A first defeated Class F. He still kept his Brilliant, but Lazy trait, but he's now showing some signs of being a Badass Bookworm. Although it's (supposely) revealed that Shouko forced him to study or else they'll get married immediately.
Keystone Army: If he's beaten, his class loses the war they're participating in.
Crippling Overspecialization: You want plans and strategies? He's your man. Unfortunately, there's no guarantee that he'll successfully execute his own part when it comes to the studying. He realizes this and goes on to subvert it in time, to the point where his Summoned Being becomes one of the three best fighters statistically in Class F, and one of the better fighters overall.
Declaration of Protection: 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.
Even the Guys Want Him: The Queer's Poll of Volume 10.5 displayed this. He's so popular that his comments were "censored". But since Yuko is shown to be commenting in Akihisa's poll, Shouko might be responsible for some of these comments as well.
Foregone Conclusion: Him marrying Shouko. He'll either concede in the end or be forcefully dragged to the altar.
The Gadfly: Loves screwing with Akihisa. Unfortunately..
Laser-Guided Karma: Bad things also returned to him. Lock up Akihisa to use him as a bait? Class-F will just kill them both. Laughed at Akihisa for drinking Tabassco? Shouko swaps Akihisa's glass with his.
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.
Played straight with Shouko, with a bit of hesitation at first, when they were young. He hatched up a plan to get three Grade 6 students He did not want Shouko to be involved whatsoever or else face transfer. But he also don't want to fight as he knows he'll lose to three upperclassmen. Cue a Battle in the Center of the Mind with his older self who's taunting him about just making excuses so he can save his own ass. He gets better, and saves Shouko. Too bad it had the effect he didn't absolutely want.
Lightning Bruiser: Of the Glass Cannon variety. He never showed his summon's abilities prior to when Class A defeated them, so it's left to speculation on which type he was before.
Jack of All Stats: To the rest of Class F's main cast, kinda. Once he studied seriously following his first defeat, his grades rival those of Class B, and it is hinted that he could make grades of a Class A Caliber student as well. However, his primary contribution to the class wars is still making up plans and strategizing, and the rest of the students specialize in subjects where they can go toe-to-toe with him, or even potentially surpass him in. And of course, Mizuki Himeji beats him in about every subject, but Yuuji boasts better physical health and stamina and doesn't need to rest as much as her.
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.
The Strategist: Is this for Class F, also for the whole Second Year when they participate in a joint Summoning Wars with the Third Year
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.
Did this again in Volume 9 of the light novels. After they defeated Class C, they finally agreed to switch classrooms with them, but it didn't stop there. Class F promptly challenges Class E to a summoning war soon after, in which they, again, won. What did Yuuji do? Trade their superior Class C facilities with Class E, much to the surprise of the principal.
Tranquil Fury: At the end of Volume 10, Yuuji is so angry at the principal for interfering Muttsurini's last blow on Shouko (which would have resulted in the victory of Class F against Class A) to the point that he signaled Akihisa to prepare 4 dozen bats with nails and Hideyoshi to prepare a shovel (as the land at the back of the hill is rather hard) while chatting with the principal. Even Akihisa told the principal to go away in order to prevent staining the carpet with blood.
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.
Minami: Mizuki..what were you planning to do to Aki...”
Crippling Overspecialization: Not regarding subjects, but in terms of physical health and stamina, which means she must rest more often than other Class F members. This is a shared weakness with Class A of which she would have landed in had she not fallen ill during the entrance exam.
Determinator: She will always take one for the team, especially when they're in dire straits. She did take 7 replenishment exams in 5 hours, no breaks, to cover for a recovering Akihisa during a summoning war with Class C.
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....
Unknown Rival: To Hideyoshi, who is very much unaware that Mizuki and Minami consider him a rival for Akihisa's heart.
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 for her guy. It might actually taste good if she 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.
In Volume 10.5 we see the "grown up"◊ Minami. While still not as big as Himeji she has nothing to worry about anymore.
Because You Were Nice to Me: Why does Minami like Akihisa? He asked her to be his friend when she couldn't make any due to the language barrier. But being who he is he asked her in French instead of German.
Cat Smile: Her Summoned Being frequently wears this.
Clingy Jealous Girl: Doesn't like seeing Akihisa showing interest in any other girl, especially Himeji.
Crippling Overspecialization: She does well in Math, but not anywhere else. This is justified because the time she spent in Germany made her forget kanji, making every other subject nigh-impossible to understand.
Eloquent In My Native Tongue: The reason why she is in the F class is because, having lived in Germany most of her life, she only reads Japanese at an elementary-school level. She can speak Japanese fluently now, though.
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.
Dude Looks Like a Lady: Incredibly so, to the point that everyone mistakes him for a girl and very little know that he is actually a guy despite him saying so. He even has his own exclusive bathhouse 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!).
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 antiquated and definitely not what a young person would use. To match with it, he refers to himself with washi, the pronoun old men use — at least in anime.
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.
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.
Big Damn Heroes: Crashes into the window with Nakamura-sensei straight to where Nemoto is during the match against Class B, which pretty much sealed the deal for the battle.
Crippling Overspecialization: The stand-out example of Class F's students — he's good at health subjects and biology, and nothing else. He is in fact so good at health and physical education that he can easily defeat Shouko, Class A's top student, if they battle in that subject.
Crutch Character: He's the go-to guy if you're in a summoning war and the subject is Health and Phys Ed, as he has the highest marks there, high enough to surpass the Class A's top student Shouko, possibly for the entire school sans Nakamura-sensei (possibly Takahashi-sensei as well, but it's already given she sucks at basic baseball rules, so...). He's useless everywhere else, however.
Curb-Stomp Battle: He possesses one of the highest, if not the highest, grade in a single subject (Health and Phys Ed) for the entire student body, so, naturally, if you fight him in his forte, expect this to happen.
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 group has recently enlarged to make up 60% of the 2nd year classes, due to the system the group employs. A heretic is targeted and he is punished by the members, many soon become single after their judgement. Enraged at other heretics who kept their relationships the heretic ends up joining the inquisition and rooting out more heretics; thus continuing the cycle and ever increasing the FFF's numbers.The only named student to be a part of this group is Ryo Sugawa.
An Axe to Grind: To uphold their dateless status, they use, among a list of weapons, axes.
Berserk Button: Mention a girl being nice and prepared to be crucified.
Blatant Lies: A survey displaying the opinions towards a rumor about Akihisa: "...after knowing about this suspicious incident, the F class' students view on the male student suspect are as follows- Death 32%, Deal Death Without Hesitation 25%, A Little Troubled But Death 23%, and Other Forms of Death 20%. As this was an important classmate they were punishing here, the students were severely divided over opinions."
Because You Were Nice to Me: A large part of why she likes Yuuji so much is because he was the only person who talked to her like a normal person. Everyone else seemed fearful of her status as a rich girl. And she misinterprets a lot of things Yuuji does for her sake, such as when he beat up those 6th grade kids who were attacking her, and later a Jerk Ass couple who made fun of her while she was in a mock wedding with Yuuji. And his attempts to paint himself as though he's not the right guy for her backfires every time, and only makes her fall more in love with him.
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.
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.
Worthy Opponent: Seems to consider Akihisa one later on in the series. A good majority of her effort in the third summoning war between A class and F class is devoted to trying to take him out early on; calling him the "first key affecting the war".
Voiced by: Mana Hirata (Japanese) and Tia Ballard (English)
A minor Class A student who was Akihisa's opponent in Physics during the Test Summon War, where she easily defeats him.
Curbstomp Battle: Delivered one to Akihisa when they faced each other during the Test Summon Wars. Their battle in Volume 10 does not end this way.
Underestimating Badassery: Not during the Test Summon Wars. Rather, this hapens in Volume 10 where her remembrance of Akihisa's defeat at her hands and his laughable revelation led her to underestimate him when she went to cut him off as he was racing to stop Kubo. The match subject was Japanese History which is Akihisa's speciality, and he dealt enough damage to her to the point where another Class F student could barely finish her off.
You Shall Not Pass: To Akihisa in Volume 10, when he went to fight Kubo a second time. She fails.
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. Akihisa then notes that she looked like she "recalled something repulsive" and wondered if something might have happened.
Hypocrite: At one point she complains about how Akihisa doesn't treat Minami with respect and manipulates her with lies when she's the one who constantly harasses her, attacks anyone who gets to close to her, resorts to blackmail, and even does things that would be grounds for criminal charges if not a restraining order in a more realistic setting on a regular basis.
Voiced by: Saori Yumiba (Japanese) and Martha Harms (English)
The member of Tea Ceremony Club and Gymnastics Club. First appears during the Ghost Outbreak Arc to defeat Kouta (and the rest of the boys except Hideyoshi, Akihisa and Yuji. She is also Yuka's sempai in the Tea Ceremony Club.
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.
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.
Innocent Fanservice Girl: When she's first introduced (in the anime anyway), she shows up in a bathrobe. She then explains to Akihisa that she was getting hot and sweaty on the train to visit him, so changed clothing on the train, while there were men in the same car as her. They suffered some minor injuries from her clothing change.
Jerk with a Heart of Gold: She often berates Akihisa for using his (often failed) attempts at trying to get a good grade as a good enough goal to strive for. But aside from her other tendencies, she does genuinely care about him and tries to look out for him, such as letting him live alone so that he could concentrate on school rather than worry about her.