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- Accidental Pervert: Has a tendency to get into embarrassing situations with the female characters.
- Babies Ever After: He and Chitoge have a son named Haku together, who is introduced in the bonus chapter included in the final volume.
- The Beard: For Chitoge in order to keep peace between their families. He also does it for Marika when her friend Mikage visits. Then Ruri when she visits her great-grandfather. Then Seishirou when she has to infiltrate a cruise ship for a mission. He does this a lot is what we're saying.
- Becoming the Mask: He comes to develop genuine feelings for Chitoge over time, not that he realizes it until chapter 199.
- Butt-Monkey: He's never safe from Chitoge's abuse. In fact, his first meeting with Chitoge began with her knee slamming his face.
- Chick Magnet: He has been all his life. Actually more justified than most examples as all the girls show to be attracted to his generally altruist personally instead of just his appearance. More specifically he happens to help them with their own life problems: insecurity by lack of goal in life (Kosaki), loneliness from being a mafia princess (Chitoge), comfort from a lifelong illness (Marika), recognition of femininity and individuality after dedicating herself to a single purpose (Seishirou), emotional comfort after losing their whole family (Yui) and protecting her from older boys (Haru).
- Childhood Friend Romance: All the members of his Unwanted Harem are his childhood friends.
- Childhood Marriage Promise: He promised to marry his childhood friend if they ever meet again. Chapter 220 reveals that Chitoge, Marika, Kosaki and Tsugumi all met with each other and, before all of them were separated, Chitoge wanted to make Raku promise to marry her. However, Chitoge overheard Raku and Kosaki admitting to like each other and decided to let Kosaki make the marriage promise with Raku.
- Clueless Chick Magnet: He was actually very popular with the girls in middle school, but too dense to figure it out. In the present, other than Marika he doesn't really notice anyone else's feelings.
- Crouching Moron, Hidden Badass: The pilot version of him KOs Claude with a Megaton Punch to the face. Current Raku doesn't fall behind either. For one, he calls out Tsugumi, a hitman, on her over-protectiveness of Chitoge saying she's nowhere as weak and needing protection as the Beehive group seems to think, gives a Dope Slap to Hana, The Dreaded imposing wife of a gangster boss that she has wrapped around her little finger and that no one in their right mind would piss off, followed by calling her an idiot over her treatment of Chitoge (and succeeds), and talks down the boss of a criminal organization that was Tsugumi's target without even flinching. Butt-Monkey he may be, but Raku has massive balls.
- The Don: He takes over the Shuei Yakuza Group this after his father's retirement.
- Failed a Spot Check: Chitoge keeps making minor image changes trying to get him to notice her but he keeps ignoring her. Eventually, he fails to even comment on her new ribbon and she blows up at him. He actually did notice her changing her shampoo and wearing chap stick but felt it wouldn't be appropriate as a man to comment. He really did fail to notice the ribbon, though, despite it being by far the most obvious change.
- Forgotten First Meeting: He knew Chitoge, Onodera, Tsugumi and Marika when they were children, but he can't remember. He does remember making a pledge with one of them regarding his pendant, but can't recall specifically who it was.
- Hair Decorations: He often wears a "X" shape hair pin.
- Harem Seeker: Gets accused of this because of the number of girls he has attracted to him, making him the most hated guy in school.
- Heroic Self-Deprecation: Second guesses himself whenever he receives a compliment, especially from Kosaki.
- Hero with Bad Publicity: As if being the son of a gangster boss wasn't bad enough, he's also got to keep up the charade of being Chitoge's boyfriend. Then Haru also hears rumors of him being a maniacal playboy toying with women at the school, and initially refuses to believe he's actually a Nice Guy suffering from Accidental Pervert moments.
- Idiot Ball: This guy just can't keep his mouth shut about his fake relationship in order to protect his own life, but has coped better over time. Still, his crush on Kosaki can still cloud his judgement, making his life unnecessarily in danger.
- In Love with Love: He's attracted to Onodera and believes himself to be in love with her, but his feelings are rather questionable given that as early as chapter 25 he begins prioritizing Chitoge, the girl he supposedly hates, over a chance with the girl he supposedly loves. Around two hundred chapters later he rejects Onodera because while he says he did like her, his feelings for Chitoge are deeper.
- In-Series Nickname: Chitoge likes to call him "bean sprout."
- Jerk with a Heart of Gold: He can be brash and rude, yet his luck with women probably stems from the fact that no matter how annoying he may find them he still wants them to be happy, and will go through a lot to make sure they are.
- Kid-anova: He started his harem when he was five years old.
- Like Father, Like Son: His son Haku doesn't seem to want to be the yakuza boss, either. Not only that, but he looks and acts like an almost carbon copy of him, but with the added bonus of Chitoge's blonde hair.
- Loose Lips: Initially, Raku just can't help denying his relationship with Chitoge, even though it is made very clear to him that his life will be in danger if that relationship is exposed as phony.
- Love Epiphany: In chapter 199, Raku finally realizes he's truly in love with Chitoge. After thinking about it a little more, he realizes she's the one he cares the most about, ultimately deciding to let go of Onodera to be with Chitoge.
- Love Makes You Dumb: His crush on Kosaki can severely affect his rationality, dangerously steer him towards Too Dumb to Live territory. One example is when being in a open-air bath full of women due to Claude's scheme, he manages to find a connecting drain which can get him out undetected. However, he hesitates when the girls gleefully tease Kosaki about who her first love is, making her run to where Raku is and block the exit before he can reach it. He only manages to escape thanks to Chitoge, who berates him for wasting his chance. Even worse, since he subconsciously believes that Kosaki is too good for him, he just assumes that the girl he pines for doesn't return his affections, despite many signs of the contrary.
- Love Confession: Finally gives one to Chitoge in Chapter 227. To which she reciprocates with her own.
- Memento MacGuffin: His pendant.
- Mistaken for Cheating: This is why Haru hates him so much at first, believing him to be lusting for her sister while being in a relationship with Chitoge, unaware that said relationship is fake. However, Kosaki isn't actually the only girl he has feelings for...
- Nice Guy: Usually willing to help out other characters with their problems without a second thought. Which is also a big reason why so many of the female characters are attracted to him.
- No Guy Wants an Amazon: He likes feminine women like Kosaki and Marika, and (supposedly) finds Chitoge unattractive for being such a violent "gorilla woman".
- Oblivious to Love: He has a hard time figuring out how the girls feel about him unless they say it to him directly. He also seems to have trouble seeing love in general, not realizing that Shuu had a crush on their teacher, and easily misunderstanding when Tsugumi was giving Shuu chocolate.
- Scars Are Forever: Has a scar from 10 years ago on the right side of his forehead.
- Single Woman Seeks Good Man: One of the reasons the girls fall for him is because of his helpful and selfless personality.
- Supreme Chef: He is a great cook. He often makes food for his yakuza subordinates. He can even create new delicious recipes.
- True Love Is Exceptional: With Chitoge. He reasons that while Chitoge is violent, noisy and rash and he enjoys being with Onodera, he wants Chitoge.
- Tsundere: He can pass a lie detector test saying that he likes Chitoge and without his memory he's very sweet and kind to her. Much to her surprise, he also thinks she's quite pretty, but he would never admit it normally. When Chitoge's mom calls him out on how much he tries to take care of Chitoge he basically just refuses to think about it.
- Unwanted Harem: He only admits to liking Kosaki, but is in denial about Chitoge. To make matters worse, he also has to deal with Tsugumi and Marika. Eventually, he also gets Kosaki's sister Haru and his childhood friend and new teacher Yui included in his harem.
- What Does She See in Him?: Suffers from this repeatedly, when new characters wonder why Raku is so popular with the ladies, such as Haru.
- What Is This Feeling?: When it seems like Chitoge is going to move away he gets pretty upset and can't figure out why. Shuu tries prodding him, asking why he would be so concerned about her moving away if she's just a friend, causing him to have an epiphany. Shuu should have kept prodding at him, though, since he has the wrong epiphany and is able to convince himself that he's just worried because she's his best friend. Uh huh, right. Even he realizes how stupid this was during his Love Epiphany in chapter 199...
- Will They or Won't They?: With Chitoge.
- Yakuza Princess: Rare Male Example. He's the son of the leader of the Shuei Yakuza.
Tsundere who has to keep up the charade and is unwilling to reveal these feelings.
- Adaptation Dye-Job: While she is blonde in both the manga and anime, the anime gives her pink highlights at the end of her hair.
- Animal Motifs: Raku associates her with a gorilla.
- Babies Ever After: She eventually has a son with Raku, named Haku.
- The Beard: She is this for Raku to keep the peace between their families. At least until she actually fell in love with him.
- Becoming the Mask: She eventually falls in love with her fake boyfriend Raku for real.
- Belligerent Sexual Tension: With Raku.
- Betty and Veronica: The Veronica to Kosaki's Betty and Raku's Archie.
- But Not Too Foreign: Her mom is Japanese while her dad is a white American.
- The Cameo: Appears as a Mystery Mushroom figure in Super Mario Maker.
- Cannot Spit It Out: It takes a while for her to even admit her feelings to herself, then she practically has a panic attack trying to confess to a teddy bear as a Raku stand-in.
- Charles Atlas Superpower: At one point she kicks down a wall.
- Childhood Friends: Tsugumi was her only friend for most of her life and they've been very close since they were children.
- Clingy Jealous Girl: She doesn't take it well when Raku gets too close to other girls, especially Marika, who throws her into this trope when she shows up.
- Compliment Fishing: Decides to try appealing to Raku by using a new shampoo, coloring her nails and wearing chapstick, but he ignores her every time. He did notice, but feels guys shouldn't comment on that kind of thing.
- Cry Cute: Some notable instances include her bursting into tears when reconciling with her mother, and bawling like a child when she thinks her red ribbon is destroyed. Or when she accepts Raku's confession.
- Expressive Accessory: Her bow twitches and perks up depending on her mood.
- Fashion Designer: The epilogue reveals Chitoge became a famous fashion designer touring all over the world. Raku complains that he barely gets to see Chitoge because of this.
- Fear of Thunder: Hearing the sound of thunder makes her cower in fright.
- Forgotten First Meeting: Turns out she met Raku, Kosaki, Marika and Yui when they were kids, but she can't remember any of it.
- Girls Love Stuffed Animals: Has lots of them stored in her cabinet.
- Hair Decorations: Often wears a red bow. This is due to a storybook from her youth and wanting to be like a girl in it. Because of its rabbit-ears shape, it's used as a funny visual shorthand to identify her speech-bubbles when she's not on screen.
- Headbutting Heroes: She gets along poorly with Marika due to Marika's singled minded pursuit of Raku and general malice towards everyone else, which mixes badly with her own jealousy and aggression.
- I Just Want to Have Friends: Her goal when transferring to Raku's school.
- I Want My Beloved to Be Happy: Turns out Chitoge did this for Raku and Kosaki since she was five. After finding out they liked each other, Chitoge gave up on Raku and made them promise to marry each other when they grew up. In the present, finding herself under the same circumstances again, she tries to do the same thing again, but this time Raku actually likes her more than Onodera.
- Informed Attractiveness: She's supposed to look like a supermodel, but since there are Only Six Faces she's not actually drawn significantly more attractive than the other girls.
- In-Series Nickname: Often called a "gorilla" by Raku, due to her tendency to hit him when she's upset. Marika also calls her this during their first meeting.
- It Meant Something to Me: Her feelings towards Raku gradually evolve into this. While he still mostly plays the fake boyfriend role partly out of obligation to his father, and partly because his feelings are mostly towards Kosaki, Chitoge's feelings for him are genuine.
- Just Friends: Raku unknowingly sends Chitoge to the friend zone, as he refuses to acknowledge his feelings for her. The most he does is to call her his best friend. It's clear that he's being an idiot but it takes him awhile to realize that they aren't just friends.
- Lethal Chef: She is not a good cook due to her subordinates not saying how bad she really is under threat of Claude shooting them.
- Lonely Rich Kid: Due to her family she had a lot of trouble making friends as a kid, and even now she becomes super excited about making friends and doing things with them.
- Love Epiphany: During the School Play, Chitoge realizes that she's genuinely in love with Raku.
- Mafia Princess: Daughter of the leader of the Beehive Gangsters.
- Meaningful Name: "Chitoge" means "1000 thorns", and "Kirisaki" is a homonym of "cut apart" (so in eastern naming order that would be "cut apart by 1000 thorns"). Describes her irritable tendencies well.
- Megaton Punch: She easily sends Raku flying with a punch.
- New Transfer Student: Transfers in at the 1st chapter.
- Not So Different: With Raku. In every scene they have together they manage to either mimic each other's actions or have exactly the same thoughts.
- Oblivious to Love: She can actually be worse than Raku sometimes. When Tsugumi spelled out her feelings for Raku, Chitoge thought the symptoms resembled a cold.
- Ojou: Is from a rich family.
- Phenotype Stereotype: She has blonde hair and blue eyes from her father.
- Primal Fear: She has a crippling fear of darkness and cramped places, though bickering with Raku can apparently snap her out of it.
- Rapunzel Hair: Not quite as extreme as some other examples, but her slightly-longer-than-waist-length hair does stand out against the generally more realistic take on hair this series uses.
- Second Love: Raku's first love was Kosaki and the two promised to marry each other when they grew up and met again. However, he comes to realize and accept that he has fallen in love with Chitoge and chooses her over Kosaki.
- Spoiled Sweet: As Ruri puts it, "even though she's a rich girl, there's not a single egotistic bone in her body".
- Town Girls: The Neither to Kosaki's and Marika's Femme and Tsugumi's Butch.
- Trademark Favorite Food: Ramen.
- Tsundere: She's abrasive, haughty and violent to Raku when she actually doesn't hate him as much as she claims. She continues to act the same for a while even after actually falling in love with him, resulting in herself lampshading her inability to be honest about her feelings. As time goes by though, her dere side has become more prominent and she doesn't hit him nearly as often.
- "Well Done, Daughter!" Girl: Chitoge worries that her mother doesn't even care about her because she never seems to make time for her daughter and seemingly can't even remember her age or birthday. She's really desperate for her approval, but is on the verge of giving up. Raku forces her to keep trying and the two finally reconcile when it turns out her mom is just a bit of an idiot and even more socially awkward than her daughter sometimes.
- When She Smiles: Raku is so used to her being very violent towards him that the few times she does genuinely smile around him, it throws him off.
- Zettai Ryouiki: An impressive Grade A. She wears them with almost all of her outfits.
- Babies Ever After: The bonus final chapter reveals Kosaki's daughter, Sasa.
- Betty and Veronica: The Betty to Chitoge's Veronica and Raku's Archie.
- Breakout Character: One of the most popular girls in Raku's harem and is the star of her own spin-off manga Magical Patissiere Kosaki-chan. It was even adapted into shorts in the second season's airing. There's also the fact that in both of ClariS's single albums for the first season's two opening themes (Click and Step), it's Kosaki who gets to appear on both covers instead of Chitoge, who is considered the main heroine of the series. note
- Cannot Spit It Out: She gets opportunity after opportunity to tell Raku how she feels about him, but never takes the chance. Even if she does try to confess, something will prevent her message from getting through to him.
- Cute Clumsy Girl: Her defining trait. It was even how she first met Raku, at least in middle school, since neither remembered their time together during childhood.
- Did I Just Say That Out Loud?: Happens quite often with her, though people rarely hear it.
- Distinction Without a Difference: Her response to Raku asking if she was giving him love chocolate. It was obligatory chocolate, just a "special" kind of obligatory chocolate. Raku is predictably confused, but understandably in this case.
- Everyone Can See It: It's obvious to everyone besides Raku and Chitoge that she has a crush on the former.
- First Love: She was Raku's childhood crush and the girl of his promise.
- Forgotten First Meeting: She turns out to be Raku's, Chitoge's, Marika's and Yui's childhood friend and the girl of Raku's promise. She can't remember meeting any of them before, though.
- Friend to All Living Things: Animals love her.
- Girl Next Door: While the rest of the haremettes are gangsters and the daughter of the police chief, Kosaki is just an ordinary girl who works in her family's bakery. Also unlike the other girls, she has known Raku for some time and is in more friendly terms with him.
- Heterosexual Life-Partners: With Ruri, who has been a close friend since middle school. They're so close that they can understand each other's thoughts with a glance.
- High-Pressure Emotion: Steam comes out of her head when she gets extremely embarrassed.
- I Want My Beloved to Be Happy: When Raku and Chitoge announce their "relationship", she's willing to give up on Raku as long as he's happy. She ultimately does this for Raku in Chapter 226, but it's clear that the act is eating up at her.
- Lethal Chef: Her food looks nice and she has the best taste buds of her family, but she can't make anything tasty unless she tries really hard or is really depressed. Funnily enough, the epilogue shows she eventually became a pastry chef.
- Love Confession: She finally spits it out to Raku in Chapter 225.
- Nice Girl: Sweet and demure to a fault. It's because of this trait that while she isn't totally safe from Marika's antagonism towards girls she perceives as competition over Raku, Marika sees her as a good friend to rely on and wanted to befriend her immediately in spite of knowing that Kosaki's one of her "love rivals".
- Romantic Runner-Up: Raku has a crush on her at the start of the manga and whenever he talks to her he's always raving about how cute she is. She also likes him back, though the two are both quite dense and never realize how the other feels. Unfortunately for her, the title of the manga is about Raku and Chitoge's relationship and when she finally confesses, she's missed her chance, even though she was the promise girl.
- Shrinking Violet: Is easily embarrassed especially whenever it concerns her and Raku being together.
- Sibling Yin-Yang: With Haru.
- Strong Family Resemblance: Not only does she look a lot like her mother and sister, when she has a daughter herself, she looks extraordinarily like her too.
- Tareme Eyes: Huge, gentle eyes.
- Town Girls: One of the two Femmes to Tsugumi's Butch and Chitoge's Neither.
- Unknown Rival: Chitoge has no idea that Kosaki also likes Raku. Kosaki usually worries that Raku's and Chitoge's feelings for each other aren't fake after all (and she's right).
Voiced by: Mikako KomatsuChitoge's childhood friend, Claude's protégée and a deadly hitman.
- Action Girl: Tsugumi is a hitman. As such, she's in top physical condition and skilled in a variety of weaponry.
- Allergic to Love: Once she begins to develop feelings for Raku, she freaks out when he barely touches her shoulder and later after analyzing her "symptoms", she assumes she must be sick.
- Ambiguously Bi: She has a very obvious crush on Raku, but there have been a few instances that hint she finds women attractive as well. Such as when she becomes the Lust Object of several of the girls thanks to a Love Potion, when Onodera starts hitting on her she finds herself thinking its not so bad. Another instance has her getting drunk and after failing to capture Raku, she instead kisses Paula. In that instant she says to Paula the same thing she said to Raku. "You have soft looking lips"
- A-Team Firing: She fails to land a single hit on Raku during their scuffle despite her training and being in the open.
- Battle Butler: Plays this role towards Chitoge.
- Beauty Mark: Has one beneath the corner of her right eye.
- Bifauxnen: Due to her Tomboyish Name and her tendency to wear clothing intended for men, practically everyone mistakes her for a pretty boy. Claude still hasn't figured out that she's a girl after knowing her for ten years. Tsugumi isn't really bothered by it so she usually doesn't correct people about her gender.
- Bodyguard Crush: She's very devoted to Chitoge, to high Les Yay levels.
- Boobs of Steel: The most action-oriented of the girls thanks to her upbringing and the one with the biggest bust size.
- Boyish Short Hair: Has very short hair, befitting her tomboyish personality.
- Breaking the Fourth Wall: During her interview by Mimiko, she somehow manages to grab the (misplaced) censor bar and hide her eyes with it after an embarrassing question.
- Charles Atlas Superpower: A lifetime of training has crafted the perfect human weapon in Tsugumi. Despite having a deceptively slim figure, she is capable of amazing feats of strength.
- Chaste Heroine: Oblivious of anything related to romance. She doesn't even know what a love letter is and has no knowledge about Valentine's Day.
- Childhood Friend Romance: She also was friends with Raku when she was a child.
- Clingy Jealous Girl:
- One of the reasons she didn't accept Raku as Chitoge's boyfriend is that Tsugumi thought she was the one who was supposed to protect Chitoge and love her the most.
- Like Chitoge, she falls into this trope when Marika shows up. She doesn't want to see her anywhere near Raku.
- She doesn't take it well when Paula challenges her to a contest, in which they have to see who can kiss Raku first. The thought of Paula stealing a kiss from Raku upsets her so much that it triggers her "Black Tiger" persona to reawaken.
- Conflicting Loyalty: She wants to protect Chitoge and ensure she's happy with Raku. Unfortunately Tsugumi is also in love with him, and is conflicted between her loyalty towards Chitoge and her love for Raku at times. She usually responds to this crisis by throwing things at, hitting, or shooting him. Paula forces this issue during their "kissing contest" in episode 2 of season 2, by seeing which of the two can kiss Raku first.
- Cool Big Sis: Paula considers her this, at the very least.
- Covert Pervert: Despite convincing herself that Raku belongs to Chitoge, she just can't help fantasizing herself being Raku's mistress.
- D-Cup Distress: She's very uncomfortable with her large breasts, as seen in episode 18, especially because Chitoge made her wear a skimpy swimsuit. Both Chitoge and Marika groping her shortly afterwards didn't help much.
- Declaration of Protection: To Chitoge.
- Even the Girls Want Her: After Seishirou is discovered to be a girl by the students, one of the boys mentions that the girls should stop paying attention to her now. Unfortunately for them, the girls still fawn over her, and rush over shortly after he says that. One girl even offers her chocolates for Valentine's Day.
- Expository Hairstyle Change: She keeps her hair short for most of the series due to her masculine personality and job as a hitman. In the Distant Finale, she has long hair now that she has become more feminine and is working as Chitoge's Fashion Model.
- Fashion Model: The epilogue shows Tsugumi eventually became Chitoge's exclusive fashion model.
- Gag Boobs: Her bust, being the biggest among the main female cast, is used as a source of humor from time to time.
- Girliness Upgrade: Became more feminine after her initial appearance. In the Distant Finale, Tsugumi has let her hair grow long and she quitted the life of a hitman to become Chitoge's Fashion Model.
- Girls Are Really Scared of Horror Movies: Even though she is a hitman, she is afraid of scary things.
- Hair Decorations: Wears a ribbon given to her by Chitoge so that people don't mistake her for a guy.
- Hidden Buxom: Wears clothes that hide how large her bust really is, then stops as the series goes on. Doesn't stop Claude from still thinking she's a he.
- Hidden Weapons: Often carry hidden weapons on her when wearing boys clothes to the point of Hammerspace.
- High-Pressure Emotion: Like Kosaki, she can also suffer from this under similar circumstances.
- In Love with the Mark: With Raku.
- Imagine Spot: Tends to get these involving herself as Raku's mistress as she is unaware that Raku's relationship with Chitoge is a sham.
- I Want My Beloved to Be Happy: An interesting case - she's okay with her love interest (Raku) being with Chitoge, but it's for Chitoge's sake, not Raku's. However, she tends to fantasize about herself being Raku's "mistress", and doesn't like the idea of him ending up with someone else, especially Marika.
- Towards the end of the manga, she finally lets him go for real.
- Last-Name Basis: Her first name, "Seishirou," is a masculine name which she was given by Claude because he is not, and was not, aware of her gender. Most of her friends (who encourage her to embrace her femininity) call her by her last name as a result.
- New Transfer Student: Transfers in at Chapter 15/Episode 7.
- One Woman Army: According to Chitoge, Seishirou singlehandedly destroyed a whole gang after some of its members harassed the former.
- Raised as the Opposite Gender: She was an abandoned child that Claude found. He took her in, but he thought she was a boy (still does), so he named her and raised her as such.
- Red Baron: She is known as "Black Tiger" in the underworld.
- Romantic Two-Girl Friendship: With Chitoge.
- She Cleans Up Nicely: Looks boyish and prefers male clothing, but is guaranteed to make heads turn when dolled up.
- Super-Strong Child: She can break a concrete pillar with a single kick.
- Supreme Chef: Raku compliments her cooking in episode 2 of season 2, to the point that he says she'd make a good wife someday. She immediately starts her Tsundere charade with him.
- Tomboyish Name: Has a boy's name due to Claude thinking that she's a boy. Note that even after ten years and throughout the series, he still hasn't figured out.
- Tomboy with a Girly Streak: She's very masculine, prefers male clothing and doesn't care that people mistake her for a boy, but she still has a penchant for cute little things.
- Town Girls: The Butch to Kosaki's and Marika's Femme and Chitoge's Neither.
- Tsundere: She says she absolutely hates Raku and doesn't want him to be anywhere near her. Don't pay attention to all the blushing nor the way she gets flustered when he does something nice for her.
- Tsurime Eyes: Focused and sharp, just like Tsugumi herself.
- Undying Loyalty: Her whole life is devoted to Chitoge.
- Unsettling Gender Reveal: Raku eventually finds out her gender on his own by taking her wet clothes off after they both fell in a pool, and Chitoge plainly tells everyone Seishirou is a girl. Later in the series, Claude is also hit with this very hard.
- Unusually Uninteresting Sight: None of the students question why Tsugumi was packing firearms during her fight with Raku.
- What Is This Thing You Call "Love"?: She's dumbfounded by the concept of love. She unfortunately figures it out the same time she realizes she has feelings for him.
- Wholesome Crossdresser: Of the "it's easier to move around in men's clothing" type.
Voiced by: Kana AsumiRaku's self-proclaimed fiancée and the daughter of the police commissioner.
- Accent Relapse: Her native backwater-sounding dialect is completely at odds with the cultured persona she cultivates, so she takes great care to speak like the others. It reverts when she's completely flustered, becomes angry, or being visited by a childhood friend from her home.
- Action Dress Rip: She rips off her wedding dress when she runs away from her wedding.
- Animals Hate Her: And she's also scared of them due to a traumatic experience in her childhood involving hamsters.
- Arranged Marriage: Her mother basically has her kidnapped and tries to marry her off to an old man.
- Bad Liar: Normally when asked about her past she feigns ignorance and avoids the question, but if forced to lie, it's often extremely obvious.
- Beneath the Mask: Presents herself as refined, feminine and elegant, but beneath that she's pretty goofy, has an accent that embarrasses her if she forgets to cover it up and is fond of sniping at her love rivals.
- Bitch in Sheep's Clothing: Acts sweet and feminine, but is rather crafty.
- Book Dumb: Definitely not stupid, but her ability to study is pretty poor due to her focus on becoming the perfect woman for Raku, and she will even sabotage her own chance to pass if it means getting more time to spend with him.
- Childhood Friend Romance: She has been in love with Raku since she was little and unlike Chitoge and Kosaki, it doesn't take a while for her to recognize him.
- Clingy Jealous Girl: This is her default behavior towards Raku and anyone else who shows interest in him (or whom she thinks Raku shows interest in.)
- Damsel in Distress: During her forced marriage arc, Raku and the others set out to save Marika from her Arranged Marriage and proceed to trash the wedding ceremony.Marika: A princess' role is to wait for the prince to save her.
- Feminine Women Can Cook: Has been taking intensive training in cooking to cultivate her "ideal woman" image.
- Flower in Her Hair: Wears a flower pin on the right side of her head.
- Foil: Marika serves as a foil to Kosaki. Both are girly girls head over heels for Raku, but, unlike Kosaki, Marika has no problem being completely open about her feelings, aggressively pursuing him, whereas Kosaki usually needs Ruri's help to summon any courage.
- Forgotten First Meeting: Another forgotten childhood friend of Raku. Marika doesn't take it well when she finds out Raku forgot about her after she devoted her whole life to him. However, it's her own fault: She acts completely differently from when they were children, so when she actually displays her real personality he instantly remembers her. She was also friends-ish with Chitoge, Onodera and Tsugumi back then, but seemingly spent more time with Raku thanks to her illness.
- Genre Savvy: She seems to know about Chitoge's antics, and believes Raku is being forced into that relationship.
- Girly Girl: Became like this to be Raku's ideal woman.
- The Glomp: Enjoys giving hear hugs to Raku.
- Headbutting Heroes: While she's not very nice in general anyway, she and Chitoge have a particularly poor relationship and will taunt her when she's done, even to the point of tears. She may not dislike Chitoge as much as it appears, however, as she seemed surprised when Chitoge started crying and was relieved when she didn't have to move away.
- Hidden Depths: Her typical act is a ditzy Clingy Jealous Girl who is mostly oblivious to anything that doesn't involve trying to hook up with Raku. Although its not revealed until much later on, much like Shuu, she's far more observant and perceptive than she is letting on.
- Hopeless Suitor: The manga is built around Raku and Chitoge's relationship, in the present he believes himself to be in love with Onodera and considers Tsugumi highly attractive at the very least. However, he's generally uncomfortable about Marika because of how pushy she is, not wanting to consider her more than a friend.
- Ill Girl: Has a weak constitution and spent a good chunk of her childhood in a hospital. It's hinted occasionally that her condition may be worse than it appears, which could explain why she pursues Raku so aggressively. It's never outright stated what her condition is, but its revealed to be treatable. However, it requires her to be treated in a foreign hospital for an extended period of time, leading to her exit from the plot.
- Important Haircut: The epilogue shows Marika cut her hair short now that she has given up on Raku and is moving on with her life.
- It Was a Gift: The flower she always wears in her hair was a gift from Raku back when they were kids.
- Japanese Dialects: Marika in the manga apparently speaks in a rough and tumble variant of Tosa-ben. However, in the anime, she speaks the dialect used in Fukuoka, likely because her voice actress, Kana Asumi, is a Fukuoka native. Either case works, as both Fukuoka or Tosa (located in Kyushu and Shikoku, respectively) would be considered backwater for someone born in metropolitan Tokyo.
- Jerkass: It's played for laughs, but she's obnoxious to her rivals for Raku's attention, including taunting Chitoge several times when she was already extremely upset. She actually does seem happy the second time when Chitoge doesn't have to move away after all but is otherwise very self centered.
- Jerk with a Heart of Gold: In her route in the game Nisekoi Yomeiri she actually has no problem befriending the other girls and makes more of an effort to focus on characters other than just Raku, even admitting that she wants to hang out with Onodera at one point but believes that the overprotective Chitoge would stop her.
- Just Friends: Ultimately, Raku's answer to her love confession is that he considers her a precious friend, nothing more.
- Keigo: Usually speaks very formally, as part of her refined image.
- Kick the Dog: When Chitoge is horrified and depressed about apparently having to move away Marika takes the time to mock her about it.
- Kick Them While They Are Down: On two separate occasions she taunts Chitoge when she's already obviously very upset. The first time Chitoge outright cries.
- Large Ham: She tends to do this from time to time, especially when she meets up with Raku again in high school.
- Like You Were Dying: A big reason for her obsession with making sure people remember her.
- Long Hair Is Feminine: Grew her hair out specifically because Raku likes girly girls with long hair.
- Love Confession: She's not afraid to let Raku know she's interested in him.
- Mad Love: Even after Raku clearly rejects her, Marika declares a single rejection won't make her give up on him and she will keep trying once she returns from America.
- New Transfer Student: Transfers in at the Chapter 33/Episode 14.
- No Sense of Personal Space: She grabs Raku whenever she gets a chance.
- Ojou: Her family is even more traditional and powerful than the Miyamotos.
- Plucky Girl: Totally dedicated to cultivating her "refined" image and be a woman worthy of Raku. Hence, she undertakes every kind of training and work she feels necessary for achieving those goals. She also manages to resist a love potion's effect through sheer willpower.
- Put on a Bus: After her forced marriage arc, Marika gets sent to America to get treatment for her illness for two years.
- Romantic Two-Girl Friendship: Mikage Shinohara is probably the only person, sans Raku and her father, whose opinion Marika actually cares about.
- Runaway Bride: The end of her forced marriage arc is when Marika lets Raku and the others take her away from her wedding.
- Secret Keeper: While it's clear she doubts the legitimacy of Raku's and Chitoge's relationship, she doesn't make any outright moves to reveal the truth to everyone else (though she will still shamelessly flirt with him). However it appears she is the one with the most to hide in regards to what happened 10 years prior, being the one who has the clearest recollection of the promise everybody is trying to figure out.
- Self-Proclaimed Love Interest: Claims to be Raku's fiancée when she's first introduced.
- Short Hair with Tail: Most of her hair only reaches her chin, but two long "tails" are grown out on both sides.
- Single-Target Sexuality: She has been in love with Raku all her life, never showing the slightest interest in anyone else. Of the girls that took the Love Potion that caused them to fall for Seishirou, she is the only one able to resist.
- Sitcom Arch-Nemesis: She seems to actually enjoy being this to the other girls, especially Chitoge and Tsugumi.
- Also with Yui who enjoys teasing and messing with Marika, but actually adores her. Marika, on the other hand, despises Yui.
- Smitten Teenage Girl: Marika's dedication to Raku is excessive to say the least.
- Stalker With a Crush: She's rather obsessed with Raku and grabs him whenever she gets a chance, and implies she put a tracker on him at some point.
- Strong Family Resemblance: The only visual difference between her and her mother is the hair color.
- Supreme Chef: Capable of making extravagant meals that both look and taste good. She says she has been honing her cooking skills for his sake. She even has a license for puffer fish preparation, something heavily regulated and quite difficult to obtain since the slightest misstep in preparing said fish can be literally lethal.
- The Tease: Loves to do this towards Raku. She takes it up a notch anytime Chitoge is watching just to get a reaction out of her.
- While she is certainly good at giving it, she is easily flustered when someone else manages to tease her, or Raku does his usual thing.
- Third-Option Love Interest: Marika's introduction further complicates the love triangle into a love square.
- Town Girls: One of the two Femmes to Tsugumi's Butch and Chitoge's Neither.
- Transfer Student Uniforms: Wears a seifuku from her old school.
- Troll: She enjoys forcing Raku into embarrassing situations and annoying her love rivals.
- Tsundere: Attempts to be this in one chapter, she couldn't handle it very well.
- Verbal Tic: "Maa!", a light and rather posh interjection. The French version translated it as "Mazette!", which gives a similar effect and keeps the original syllable.
- What the Hell, Hero?: Marika loses her usual demeanor as Raku delivers a stream of Armor Piercing Questions about not remembering who she was and only having vague memories of the meeting ten years ago. She lambastes him, stating everything she's done for him in the last ten years, such as thinking about him every day and growing her hair longer because he said he didn't like girls with short hair.
Voiced by: Koji Fujiyoshi (vomic), Yuuki Kaji (anime)Raku's bespectacled best friend.
- Bromantic Foil: To Raku, being the extroverted, perverted goofball to highlight his calmer, introspective friend.
- Butt-Monkey: Gets this treatment from several of the characters, usually Ruri or Raku.
- Camera Fiend: Likes to take all sorts of (occasionally embarrassing) photos of his classmates. It proves useful when he reveals to Ruri that he took a picture of her smiling with her great grandfather just before the latter died and she regretted not smiling on her last photo with him.
- Cat Smile: Often has one, especially if something perverted is going on. When it gets especially prominent, it's a sign even Raku can pick up on that he's hiding something.
- The Chew Toy: Shuu winds up on the wrong end of a lot of abuse, especially from Ruri.
- Chivalrous Pervert: As shameless and obnoxious as he is about being a pervert, he does gently reject a girl for confessing to him since he doesn't return her feelings and it wouldn't be fair to her. He even thanks her for having the courage to confess.
- The Friend Nobody Likes: Downplayed. He certainly gets off better than most best-friend characters in modern-day Harem Genre, but is still the most frequently mocked and abused by the rest of the main group with the exceptions of Kosaki and, surprisingly, Chitoge. Besides that, he has more of a social standing outside of the main cast, being surprisingly popular among the female populace in his school in spite of his perversion. He'll even be actively receiving love chocolates on Valentine's day as well as his share of girls confessing to him.
- The Gadfly: Shuu readily admits that he purposely annoys people for his own amusement.
- Genki Guy: He's always full of energy. However, this this wasn't always the case: prior to the series' start, he was outwardly friendly but inwardly reserved until Ms. Kyoko and Raku gave him the motivation to try his hardest at whatever he's doing, whether its being a Nice Guy or trolling. But mostly trolling.
- Hidden Depths: While he's a smartass who intentionally puts his friends in embarrassing situations for his own amusement, he has his own serious and sensitive side and often his antics turn out to have a legitimate purpose. Most of the characters quickly catch on to his true nature (even if they still find it annoying), but Ruri in particular typically can't see past his outwardly Jerkass behavior.
- Hooked Up Afterwards: With Ruri. Near the end of the story, Ruri confesses to him, but Shuu isn't ready to give her an answer. Any development they had afterwards is left to the imagination, but the epilogue does let us know they eventually got together and are planning to get married.
- Hot for Teacher: Has a crush on his homeroom teacher, Kyouko. After she rejects him, he says he needs some time to move on.
- Jerk with a Heart of Gold: Despite his constant trolling and teasing, Shuu is quick to notice if any of his "friends" are hiding something or feeling down, and in his own way will try to help. When he gets serious, he's as much of a Nice Guy as Raku is.
- Megane: He actually seems to be proud of his glasses, acting as if they give him special privileges.
- Obfuscating Stupidity: Although he acts like a goof most of the time, on the rare times he's shown acting seriously, its shown he has very good insight into the true relationships between the characters. He seems to know that all of the girls are in love with Raku, and while Raku only explicitly tells him that he's in love with Onodera, Shuu can tell he is also in love with Chitoge and tries to prod Raku into recognizing it.
- Oblivious to Love: Ironically, despite how easily he notices the feelings between Raku and the girls who like him, Shuu completely misses the growing attraction Ruri has for him and is caught by surprise when she confesses in Chapter 223.
- Opposites Attract: With Ruri. Shuu is cheerful, funny and a tease, Ruri is blunt, cold and grumpy.
- Shipper on Deck: He tends to support the Raku x Chitoge ship, though he doesn't seem to mind watching the other girls go after Raku as well. He mostly just seems to want Raku to be happy and to amuse himself watching the rest of the cast's romantic miscues.
- Stepford Smiler: Part of his tendency to not let his actual feelings show that much, he went around smiling and acting cheerful when he learned Kyouko-sensei was getting married and retiring. Raku saw through it and mentioned that he'd had said tendency since he was a little boy, and literally kicked Shuu's butt into gear to do something about it.
- After Ruri gives him "The Reason You Suck" Speech in chapter 209 after he had earlier expressed his doubts about himself as a person to her, he almost immediately shifts to his usual Cat Smile, politely excuses himself for bothering her, and keeps a friendly tone as he walks away — even as it's obvious to them both that what she said deeply hurt him.
- When He Smiles: A variant in that while Ruri can't stand his usually mischievous and/or perverted smiles, Chapter 207 shows her just staring in stunned silence every time she sees him do a rare sincere smile.
Voiced by: Yumi UchiyamaKosaki's bespectacled best friend.
- Academic Athlete: She gets pretty good grades and is also the best swimmer of the school swim club. It's revealed in Chapter 102 that she has broken several swimming records during middle school and is known as "The Mermaid."
- Agitated Item Stomping: Except the "item" tends to be a guy who annoyed her; usually does this to Shuu, though Raku was also subjected to stomping after an Accidental Pervert moment.
- Beautiful All Along: With her hair down and without her glasses, she is as attractive as the main female characters.
- Belligerent Sexual Tension: With Shuu. It's difficult for her to reconcile her absolute loathing of the mischievous and perverted personality he usually displays with her budding attraction toward his kinder Hidden Depths.
- Blind Without 'Em: Without her glasses, she has a hard time seeing and distinguishing things.
- Brutal Honesty: Ruri has zero brain-to-mouth filter, and will criticize Kosaki's lack of progress with Raku every chance she gets.
- She tearfully regrets this in Chapter 209. Her increasingly horrified inner monologue is shown with every line as she realizes how wilfully hurtful she's being but just can't make herself stop lashing out.
- Don't Call Me "Sir": She doesn't like to be called "ojou-sama" by her great-grandfather's servants.
- Double Standard: Rape, Female on Male: She usually encourages Kosaki to force herself on Raku.
- First-Person Smartass: Ruri has plenty to say, but only the audience ever gets to hear it.
- Heterosexual Life-Partners: With Kosaki, who has been a close friend to Ruri since middle school. The two are so close that they can communicate without saying a word.
- Hooked Up Afterwards: With Shuu. Near the end of the story, Ruri confesses to him, but Shuu isn't ready to give her an answer. Any development they had afterwards is left to the imagination, but the epilogue does let us know they eventually got together and are planning to get married.
- Love Confession: To Maiko. Just like her, straight in the face. Maiko is astounded.
- Love Epiphany: Admits to herself that she's fallen for the better side of Shuu in Chapter 209.
- Meganekko: The one trait Maiko loves to remind her that they share.
- Ojou: Actually comes from a very wealthy family, whose family compound in the country is even bigger than Raku's or Chitoge's house.
- Opposites Attract: With Shuu. Ruri is blunt, cold and grumpy, while Shuu is cheerful, funny and a tease. It is, of course, just rumors and comedy. Well, not really. Especially once it's confirmed she likes him in chapter 209.
- Perpetual Frowner: Ruri does not smile.
- Rapunzel Hair: Her long hair goes down to her knees.
- "The Reason You Suck" Speech: In Chapter 209, she starts harshly accusing Shuu of never having been serious about liking Kyoko, that she can't trust his apparent serious side because of said behavior, and that said behavior makes him disgusting to be around after a joking comment by Shuu about finding pretty girls to flirt with sets her off. This was after Shuu just poured his heart out to her about wanting and striving to be a better person and she just acknowledged to herself that his outward behavior was just a facade.
- Satellite Character: To Kosaki. Ruri essentially functions as Kosaki's conscience and someone to bounce her thoughts off of.
- Second Love: Shuu liked his teacher Kyouko first and he admits he needs some time to move on after she rejects him. When Ruri confesses to him, she tells him she's willing to wait all the time needed for Shuu to fall in love again. The epilogue shows they eventually did get together and are planning to get married.
- She Cleans Up Nicely: Raku is quite stunned to see her in a kimono.
- Shipper on Deck: She aggressively ships Kosaki x Raku. While she aggressively pushes Kosaki to do something about it, she typically stops short of being The Matchmaker. While she (and Shuu) know that their best friends' attraction is mutual, Shuu convinces Ruri that its best if they don't tell them about it and let it play out.
- Single Woman Seeks Good Man: She finds herself attracted to Shuu's kinder Hidden Depths, as much as she hates to admit it.
- The Stoic: She always carries a subdued demeanor, rarely ever projecting strong emotions.
- Sugar and Ice Personality: She mostly comes off as cold, blunt and harsh, but she has a very apparent soft spot for those she cares about.
- Tsundere: She calls Shuu a "complete voyeur-camera perverted scum" and gets furious when someone jokes about the possibility that there might be something going on between her and him. It's still pretty obvious she has a thing for him, not that she's going to admit it.
- Tsurime Eyes: Her eyes are perpetually stuck as such.
- What Does She See in Him?: As the only female member of the cast not explicitly attracted to Raku, she occasionally seems puzzled as to her best friend's attraction to someone as obviously dense as he is.
- When She Smiles: Played with. Shuu gives her a picture he secretly snapped of a rare candid moment of her smiling right after she regretted not smiling in the last photo of her with her grandfather just before he died. It's quietly hinted that Shuu liked seeing that side of her.
- In chapter 223, she smiles warmly at Shuu when her confession catches him by complete surprise despite how savvy he usually is about people's feelings, causing him to blush wildly.
Voiced by: Yui HorieRaku's childhood friend who is a couple of years older than him, the don of a Chinese organization and the main cast's new homeroom teacher. She is also the holder of the fourth, and supposed last, key.
- All-Loving Heroine: She tells Chitoge that while she loves Raku her feelings are just the same for Chitoge, Marika, Kosaki, and Tsugumi. Marika seems to be aware of this and while Chitoge feels Yui's feelings make her more mature, Marika has the opposite feeling.
- Babies Ever After: She's shown pregnant with her first child in the Distant Finale.
- Bedmate Reveal: Has a "habit" to sneak into Raku's bed.
- Childhood Friend Romance: With Raku.
- Childhood Friends: With Raku, Chitoge, Kosaki, Tsugumi, and Marika.
- Child Prodigy: Was able to complete college by the age of fifteen and is a fully licensed teacher at nineteen, only two years older than the students in her class.
- Cool Big Sis: Sees herself as this for most of the group.
- The Don: Of a Chinese triad. She united them with the power of Cry Cute, no less.
- Dreadful Musician: She's revealed to have a singing voice so horrible it can cause people to faint. It even turned Marika into a pillar of salt.
- The Gadfly: Enjoys messing with people, especially Raku and Marika.
- Hot for Student: For Raku. To be fair, they're a lot closer than most examples.
- Hot Teacher: She is only nineteen.
- Improbable Age: She's nineteen years old, gorgeous, and assigned as the homeroom teacher for a group of second year high school students, one of which is practically her brother.
Shuei Yakuza Group and Associates
A gang of Yakuza, lead by Raku's father.
- Undying Loyalty: To each other, but especially to Raku and his father. They're as much a part of the family as they are subordinates.
- The feeling is mutual, as Raku is willing to work hard for the sake of his father's men.
Voiced by: Kenichi OgataRaku's father and leader of the Shuei Yakuza Group.
- All There in the Manual: His given name is only mentioned in the fanbook.
- Odd Friendship: Drinking buddies with Commissioner Tachibana.
- Reasonable Authority Figure: He doesn't try to hinder Raku too much, and usually seems agreeable to anything his son is doing.
Ryuunosuke "Ryuu" Sasaki
Voiced by: Nobuyuki HiyamaOne of the group's subordinates.
Beehive Gang and Associates
A gang of mafia from America, led by Chitoge's father.
- Undying Loyalty: To the heads, and Chitoge. Most especially seen in chapter 162 where after hearing Chitoge cry at the thought of being separated from Raku and her friends, they immediately petition for the move to be cancelled and swear to never fight Shuuei ever again.
Adelt Kirisaki Wogner
Voiced by: Masashi EbaraThe leader of the Bee Hive Gang and Chitoge's father.
- Be Careful What You Say: At the end of Chapter 158, Adelt jokes to Chitoge that she really has fallen in love with Raku. Chitoge, being what she is, embarrassedly denies it on the spot and runs away. Adelt immediately figures out that his joke was actually spot on. Which makes him feel horribly guilty because they're preparing to leave for America, and that Raku and Chitoge don't need to act like fake lovers anymore. Thankfully, he takes steps to fix this.
- Dogged Nice Guy: Was this to Hana.
- Henpecked Husband: Being a powerful gangster boss does not mean he can escape his wife's wrath. Raku quickly learns why his wife is The Dreaded around him and Chitoge, in addition to the regular gang members.
- Love at First Sight: He fell in love with Hana when he first saw her walking nonchalantly during a shootout delivering pizza and he proposed to her right on the spot.
- Tranquil Fury: When he gets serious, Adelt can be so intimidating without raising his voice that even Claude has to yield under pressure.
Voiced by: Megumi ToyoguchiChitoge's mom, a CEO. However her control over companies worldwide is on another level.
- Armor-Piercing Question: To Raku. "Are your feelings for my daughter truly fake?"
- Broken Ace: She may be a powerful, unmatched genius in any field she puts herself to, managing companies and having the Beehive under her thumb due to sheer force of presence and even being inhumanly powerful... But just like her daughter, she has trouble telling her true feelings to others, and is suffering due to not being able to spend time with her family.
- Cry Cute: When she finally comes to terms with her love of Chitoge.
- The Dreaded: Everyone who knows her is afraid of her. Raku quickly finds out why on his first meeting with her, and being volunteered to be her secretary for a couple of days.
- Mum Looks Like a Sister : Even though he knew the fact, Raku still thought she looks more like Chitoge's sister than her mother.
- Omniglot: She can hold a conversation in 5 languages.
- Oral Fixation: Often has a chocolate cigarette in her mouth. This is because she stopped smoking when she had Chitoge.
- Red Baron: Known as "Madam Flower" to the Beehive Gang.
- Sugar and Ice Personality: She loves her daughter a lot, but she's also too cool and distant to show it.
- When You Coming Home, Dad?: She is often traveling around the world and only comes home during Christmas.
Voiced by: Takehito KoyasuChitoge's primary bodyguard.
- Big Bad: Or at least the closest thing the series has to one, being the only one who is actively suspicious of Raku and Chitoge's relationship and actively trying to expose Raku as a fraud. Whenever a serious problem of some sort occurs in the series, odds are high he's involved somehow.
- Bodyguard Crush: His obsession with Chitoge can be interpreted as this.
- Crazy Jealous Guy: The driving force behind his desire to expose Raku and Chitoge's fake relationship.
- Failed a Spot Check: Is completely unaware of the fact that Tsugumi is actually female. When Tsugumi reveals this to him by tearing open her shirt, he asks when she underwent such an operation.
- In-Series Nickname: Raku strictly refers to him as "Megane".
- Jerkass: His one Pet the Dog moment aside, there's nothing remotely close to a good trait about this guy.
- Pet the Dog: He is the closest thing to a villain this series has, but even so, he did take in and raise an orphan Tsugumi. That's about the one redeemable thing he ever did in the series.
- Relationship Sabotage: Extremely dedicated to this. He actually wants Tsugumi to marry Chitoge instead, knowing from the start that Tsugumi's feelings for Chitoge have been above and beyond her line of duty.
- Scary Shiny Glasses: Often have these when trying bring down Raku.
- Selective Obliviousness: For such a professional like him, it never crosses his mind that Seishirou may actually be a girl, even after she decides to wear a ribbon.
- Shipper on Deck: Secretly wants Seishirou to marry Chitoge. When that intention of his is revealed, Seishirou is not amused and decides to just outright show her true gender to him, the hard way.
- Stalker With a Crush: If putting Chitoge's portrait right next to him when eating or having a nosebleed when looking at her in a bikini through his binoculars is any indication.
- Weapon of Choice: Claude always wields a Desert Eagle.
- Well-Intentioned Extremist: Well...he wants Chitoge's well-being...but he is far too possessive and obsessed with her for his intentions to be even considered remotely good, and it's very clear he's nothing but a negative influence on Chitoge's life because of that.
- White Hair, Black Heart: His schemes to bring Raku down come from sheer possessiveness and pettiness rather than desire to protect Chitoge.
The local police force, led by Marika's father.
Commissioner Gen Tachibana
Voiced by: Fumihiko TachikiMarika's father.
- Achey Scars: His scar pulsates when he sees Raku's face because it reminds him of his father.
- Doting Parent: Cares a lot about his daughter, according to Marika.
- Good Scars, Evil Scars: Has a rugged scar given to him by Raku's father.
- Henpecked Husband: He's the chief of police, but he can't go against his wife. She actually throws him into a dungeon when he tries to do something about Marika's forced marriage.
- Love Martyr: He knows his wife is an awful, selfish person that only cares about family traditions and treats their daughter like a tool, but he still loves her.
- Odd Friendship: Drinking buddies with Raku's yakuza father.
- Red Eyes, Take Warning: Which scare Raku to no end.
- Worthy Opponent: Considers Raku's father this, hence the Odd Friendship above.
Voiced by: You TaichiA police officer who acts as Marika's overseer. She is actually the head of the Tachibana Family's Hidden Guards.
- Legacy Character: Her first name, Shinobu, is actually a title, given to the head of the Hidden Guards. Her real name before inheriting the title is Youko.
- Meaningful Name: The kanji of her given name (忍) is part of the word "shinobi" (忍び), i.e. a ninja.
- My Master, Right or Wrong: She will do anything her mistress Chika wishes. That includes kidnapping Marika to force her into an Arranged Marriage. However, Honda ends up betraying her in favor of Marika.
- Ninja: Technically serves as one to the Tachibana family. Raku and his friends lampshade this.
- Parental Substitute: She has been watching over Marika ever since infancy and given the way Marika's real mother is, Honda is certainly the closest thing to a mother Marika really has.
- Peek-a-Bangs: Her hair covers her left eye.
- Undying Loyalty: To her mistress, Chika. However, Honda later proves her loyalty to Marika comes first.
- Wrestler in All of Us: Does a "Shining Wizard"note to Migisuke when he proposed to her in chapter 112.
Voiced by: Takahiro SakuraiThe captain of the first riot police squad.
- Reasonable Authority Figure: He isn't the type to cause trouble when off-duty, and understands that it couldn't be helped that Raku was born into a yakuza family.
A normal Japanese family who runs a sweet shop, ruled by Kosaki's mother.
Voiced by: Sayaka OharaKosaki's and Haru's mom.
- Amazingly Embarrassing Parents: Kosaki and Haru are not amused by her attempts to get Raku to be her son-in-law or her underhanded plans for getting more business for their store.
- Hair Decorations: Wears a scrunchy.
- Mum Looks Like a Sister: Raku himself lampshaded that she looked more like Kosaki's older sister.
- Serious Business: Japanese sweets. Considers Japanese-Western fusion heresy, and is willing to embarass her daughters to get more customers.
- Shipper on Deck: For her daughters to Raku so he can inherit her sweets business.
Voiced by: Ayane SakuraKosaki's little sister, not quite as shy and much more gifted for cooking.
- Big Sister Worship: Towards Kosaki. It's for this reason that she was initially hostile to Raku when she found out that he was the guy Kosaki likes.
- Birds of a Feather: She and Raku have a similar taste in things, to the point where the only reason they don't get along is because of her initial misunderstandings.
- Bratty Half-Pint: Oh so much. Granted, she's only a year younger than the protagonists, but her immaturity and irrationality make up for that. She eventually gets better thanks to Character Development.
- Cousin Oliver
- Defrosting Ice Queen: At first, she treats Raku with nothing but irrational and petty contempt. Once she gets over her misunderstandings, she opens up to him and instead becomes more of a Tsundere only to him.
- Even the Girls Want Her: Both her best friend Fuu-chan and her kouhai Ricchan have shown attraction to her.
- Hair Decorations: Wears hair clips and has a scrunchy holding her side ponytail.
- Hate at First Sight: Haru instantly hates Raku based on her own assumptions. The fact that he accidentally sees her panties twice the first day they meet does not help either.
- Idiot Hair: It stays even after her Important Haircut.
- I Want My Beloved to Be Happy: She eventually realizes she has a crush on Raku, but decides to support her sister instead and let them be happy together. Zig-zagged in that while she's made several attempts to officially "give up" on him, she gets interrupted and falls in love with him every time. She finally gives up on him later in the story.
- Loves My Alter Ego: She's in love with the "prince" who saved her from a gang, but she doesn't know and refuses to believe he is actually Raku. She eventually realizes those two people are one, and has trouble abandoning her love with Raku for the sake of her sister since then.
- Matchmaker Crush: She decides to support her sister's relationship with Raku, but there's the issue of her own feelings for him.
- My Sister Is Off-Limits!: Doesn't want Raku to be with her sister at first due to a misunderstanding. After realizing Raku is a really nice guy and that her sister likes him, she decides to support their relationship.
- No Sense of Direction: Sometimes she can't even tell what floor she is on in a mall even though there is a sign.
- Rescue Romance: She loves the "prince" (Raku) who saved her from a gang.
- Secret Secret-Keeper: She eventually figures out that Raku and her prince are the same person, but she still pretends she doesn't know around Raku.
- Senpai Kohai: She's a kohai to all the main cast.
- Shipper on Deck: After learning she misjudged Raku she tries to get him and her sister together; though that gets complicated because of the Sibling Triangle.
- Sibling Triangle: She has fallen in love with Raku, just like her sister.
- Took a Level in Kindness: In her first appearances, she comes off as an irrational and bitchy little brat, but thanks to some Character Development she eventually becomes nicer. She's still short-tempered, but more in a typical Tsundere way.
- Tsundere: She is extremely harsh towards Raku due to hearing bad rumors about him being a playboy that likes to victimize girls. Once she finds out the truth she becomes much nicer.
- Your Cheating Heart: Part of the reason why she's so hostile towards Raku initially. He seems romantically interested in her sister, while already dating Chitoge.
Char Siu Group
IeYui's personal bodyguard.
- If You Ever Do Anything to Hurt Her...: She warns Raku that if he ever makes Yui cry, she will kill him.
- Shipper on Deck: Ships Yui x Raku.
Voiced by: Hitomi NabatameThe teacher of Raku's class. She later left when she marries.
- Babies Ever After: She appears in the Distant Finale as a mother of two.
- Back for the Finale: She makes a short appearance in the final chapter with her children.
- Put on a Bus: She gets married and leaves the story.
- Quitting to Get Married: She quits her job as a teacher when she gets married.
- Sensei-chan: Between her young appearance and teasing demeanour, at times you could think she's a classmate rather than a teacher. The fact she's only known by her first name is an indication.
Mikage ShinoharaMarika's junior-high school friend.
- Ambiguously Bi: Practically salivates over the girls in the series, and is implied to be in love with Marika. On the other hand she says her only love is Johnny Depp, but she might just be joking…
- Genki Girl: This girl must inhale sugar every morning.
- Hyper-Competent Sidekick: Despite Raku getting most of the credit, pretty much all of Marika's rescue was planned and orchestrated by Mikage, to the point that the others did very little except go where and do what she told them to.
- Romantic Two-Girl Friendship: She is very concerned about Marika and her life, Marika herself is shown to care a great deal about Mikage.
- Secret Keeper: Knows some important things about Marika's past but agrees to keep them secret.
- Took a Level in Kindness: She used to lead a pack of bullies against Marika when they first met, but they are now best friends.
Suzu "Fuu-chan" Ayakaji
Voiced by: Kotori KoiwaiHaru's best friend and classmate.
- All There in the Manual: According to the official fanbook, her real name is Suzu Ayakaji.
- Incompatible Orientation: Seems to have a thing for Haru, but it's not going to work with Haru crushing on Raku.
- Matchmaker Crush: Seems to be a lesbian with a thing for Haru, but apart from taking fanservicey pictures of her doesn't do much about it. Instead, she prefers to help push her towards Raku while outwardly claiming that she's helping Kosaki and Raku like Haru asks her to.
- Only Known by Their Nickname: Everyone calls her "Fuu-chan" instead of her given name Suzu.
- Punny Name: Ayakaji (彩風) stands for Colorful Wind. The last kanji (風) can also be read as Fuu.
- Schoolgirl Lesbian: Has shown a pretty obvious attraction to Haru.
- Shipper on Deck: Despite her own attraction she is more than willing to support Haru/Raku whether Haru likes it or not.
Voiced by: Manami NumakuraTsugumi's fellow hitman. She wants Tsugumi's approval and tries to help her make progress with Raku. Unfortunately, she's alarmingly incompetent at everything apart from being a hitman and is easily frightened.
- Action Girl: Is a hitman.
- A-Cup Angst: She is jealous that Tsugumi has bigger breasts than her.
- Afraid of Needles: Hates getting shots the most.
- Animal Motifs: Raku compares her to a frightened cat when she climbs high places in order to not get a shot.
- Badass Cape: Has one to hold her weapons.
- Book Dumb: She even gets zeroes.
- Bullying a Dragon: Her attempt to "reawaken" the "Black Tiger" in Tsugumi with her kissing contest in episode 2 of season 2. Tsugumi essentially delivers a Curb-Stomp Battle to Paula, and "wins" by an Indirect Kiss with him. She later gives Paula a Death Glare so scary the latter decides to drop her protest on the win.
- Can't Hold His Liquor: Notable aversion, as while all the other girls get easily drunk from a sip of sweet wine in Chapter 173, Paula doesn't and states that it isn't even good.
- Establishing Character Moment: In the anime, her first meeting with Tsugumi in episode 2 of season 2 starts with both girls shooting at each other. Raku attempts to stop the gun fight, but gets kicked by Tsugumi instead.
- Girls Are Really Scared of Horror Movies: Even though she is a hitman, she is afraid of scary things.
- Hair Decorations: Has a hairband that has ribbons on it.
- Hidden Weapons: Hides her weapons in her cape.
- I Have Many Names: She has multiple nicknames in the underworld.
- I Have the High Ground: Whenever she wants to be alone, she always go to high places. Her first appearance has her standing atop a smokestack.
- Overshadowed by Awesome: She was a pretty competent hitman. But compared to Tsugumi, she was completely outclassed, and ends up viewing her more like The Rival.
- Picky Eater: Vegetables, tomatoes and shitake mushrooms are things she hates to eat.
- Red Baron: She is known as "White Fang" to the Beehive Gang.
- Scarf of Asskicking: Often wears a scarf.
- Shipper on Deck: For Tsugumi x Raku.
- Super Drowning Skills: She is unable to swim.
Yoshizou MiyamotoRuri's doting great-grandfather.
- Amazingly Embarrassing Parent: Great-grandfather, but he still does a good job embarrassing Ruri in front of her friends, such as showing them embarrassing old photos from when she was a child.
- Doting Grandparent: He absolutely adores his great-granddaughter.
- Killed Off for Real: After bluffing Ruri into doing things for him for years with fake illnesses, Yoshizou finally succumbs to old age and dies.
Chika TachibanaMarika's mother and the Tachibana family's matriarch.
- Abusive Parent: She only treats her daughter like a tool for their family traditions and she doesn't care at all about Marika's feelings and wishes.
- Arranged Marriage: Her marriage was decided by her family, thinking of what was best for the family instead of her.
- Break the Haughty: She starts to lose her cool when Raku and the others arrive to wreck Marika's wedding ceremony and Honda betrays her in favor of Marika.
- Emotionless Girl: Extremely expressionless and emotionally distant, not understanding or caring about others' feelings.
- Empty Eyes: Perpetually has those, which complements her Emotionless Girl image.
- Evil Matriarch: The current leader of the Tachibana household, who will do anything to keep up the family's tradition, and her Establishing Character Moment is her being totally apathetic to her daughter's feelings and capturing her to force her into an Arranged Marriage.
- Ill Girl: Her body is even frailer than her daughter's.
- Freudian Excuse: She says she lived as her family's traditions dictated. Her mother was very strict and distant, her marriage was decided for her and her body was even frailer than her daughter's. It doesn't justify it, but at least her husband can understand she must be taking out her frustrations on Marika.
- Jerkass: She's rather callous and insensitive to others' feelings. She treats her own husband and daughter as slaves.
- Mum Looks Like a Sister: Does not look any older than Marika. Raku mistakes her for Marika's sister when they first meet and is shocked when she tells him she's her mother.
- Troubled Abuser: She says she just treats Marika in the same way her own mother treated her.
"The Author"The author who wrote the storybook from the main characters's youth and is revealed to be Raku's mother.
- The Faceless: Her face is not revealed but described by Chitoge, she is a really beautiful person accompanied with a mysterious presence.
- Mum Looks Like a Sister: Similar to her friends Hana, Nanako and Chika, she looks more like Raku's sister than his mother.
- Walkingthe Earth: She's now traveling around the world while drawing picture books.
Bonus Chapter's Characters
Characters from bonus chapter included in the last volume.
Haku IchijouRaku and Chitoge's son.
- Animals Hate Him: Like his father, animals don't like him.
- But Not Too Foreign: He is a quarter American, inherited from his mother.
- Family Theme Naming: Haku, son of Raku.
- Hair Decorations: He wears a "X" shape hair pin.
- Phenotype Stereotype: He has blonde hair and blue eyes from his mother.
- Strong Family Resemblance: He resembles his mother.
- Yakuza Princess: Rare Male Example. He's the son of the leader of the Shuei Yakuza.