Skuld acts in a manner resembling this trope — about her sister — when she perceives that Keiichi and Belldandy are becoming more romantically close.
Similarly, but much less severe, could be Belldandy herself. Things have been known to randomly explode if she sees Keiichi receiving excessive attention from another girl. Even when she keeps it under control, however, she makes it quite clear to others that she would save Keiichi's life even if meant the destruction of the entire universe in a heartbeat and will not tolerate people randomly interfering with their relationship. This becomes especially apparent when she flatly refuses the personified Gate of Heaven's request for Keiichi to teach her about love; when the Gate accuses her of being unusually selfish for a goddess, she calmly replies, "Yes; with Keiichi, I am not so generous."
In the second season of the anime, when Hild's loli-form goes back in time to seduce a younger Keiichi, she acts like a Clingy Jealous Girl towards him every time Belldandy (who has also come back in time to stop Loli-Hild) tries to talk to Keiichi.
Mayu Miyuki is notorious for this, outraged when any other girl does anything with Kaoru and she does not, and regularly (and dramatically) proclaiming her love and plans for their future. Made even worse by the fact that she never really stops, just tones it back somewhat... even after Kaoru is married.
Averted by Tina who handled her disappointment far better than Mayu did... funny, considering how Mayu was always criticizingher for being graceless.
Kizaki Tamayo from Angelic Layer acts this way towards her classmate Kobayashi Koutarou. When Misaki (the main character) starts getting close to Koutarou, Tamayo's already excessive friendly-violence steps up a notch. Then again, in the manga, she acts this same way and has only one scene to suggest any romantic motives (and ends up with someone else; the anime, on the other hand, pairs her with Koutarou).
Armored Trooper VOTOMS has Coconna, who gets extremely jealous of the attention Chirico pays to Fyanna. She is always having to convince Gotho and Vanilla to save Chirico when he gets captured during the first arc.
Zigzagged by Moe "Suzu" Suzuya in Asteroid in Love. In the beginning of the series, she made it clear she'd take all means to prevent Mira from getting a boyfriend, and was relieved when Mira found out the "boy" she has a crush on is actually a girl. Defied later; after beginning to feel jealous of Ao for getting so close to Mira so quickly, she does a one-eighty and realizes that all three of them can be friends without competition.
Casca was initially born from this trope, after Griffith in his shining armour saved her from being raped by a nobleman, Casca unashamedly worshiped him and was left disheartened that he never truly returned her affections. So when Casca heard Griffith openly say "I want you" to then newcomer Guts, Casca was stricken with jealousy and was vicious and cold towards Guts for three years straight, even punching him down at one point and crying asking "Why did it have to be you?". Casca especially is dismayed over Griffith risking his life to save/protect Guts at all costs, leading to her declaring that she didn't care what happened to Guts so long as he didn't ruin Griffith's dream.
However unbeknownst to Casca, Guts took her words and attacks even harder since he developed feelings for her and was left angry at her unshakable love for Griffith and her blaming him making him somewhat of a Crazy Jealous Guy in parallel to Casca, but he went above and beyond to protect her causing Casca to be shocked and grateful. These actions ultimately cause Casca to lessen her love for Griffith since she found a person who will return her affection unconditionally.
Casca was also jealous of Princess Charlotte who Griffith was courting her as the fastest way of becoming Royalty. It is also at this point Casca knows she doesn't stand a chance with Griffith unless she intends on ruining his dream note it's even shown Casca is potentially suicidal because of this . After Guts completely changed her mind and turned her head Casca still shows faint signs of jealously/discomfort when she learned Griffith slept with Charlotte, but seeing Guts getting pissy himself over her visible trouble caused Casca to curse herself realizing she was being ungrateful towards Guts' love note especially since she was pregnant with his child at the time and immediately apologized to him. Guts forgives her easily admitting he is just as troubled over Griffith as she is.
Rosine the insect child Apostle is an outright Yandere. One of her reasons for attacking Guts is because she believes he will take her friend Jill away from her, which is very Squicky since both of them are way younger than the adult Guts. It's also poignant that Rosine assumes Jill is romantically attached to Guts, as she has no understanding of a father figure since her own father was an extremely cruel man.
Farnese originally started off hating and fearing Guts, but after he saved her and her half brother Serpico during the Conviction Arc Farnese soon began to hero-worship Guts in a very similar fashion to Casca and Griffith. Farnese did her best to protect the now mentally regressed Casca to please him and would be overjoyed at any praise he gave her and even latching onto him in the troll cave, however Farnese began to take issue with Guts sacrificing every fiber of his being to protect Casca from any and all danger. Culminating in Farnese yelling at Casca when they were alone, angry that Casca doesn't recognize to lengths Guts goes to keep her safe and cure her condition, Farnese soon apologized to Casca who could at least understand she'd upset her.
Farnese does her best to keep Guts separated from Casca, especially getting upset when Casca interrupted her healing of a wounded Guts, Farnese even snaps out of her astral form when Guts is about to inform Roderick that Casca is "his woman". Farnese even dislikes Moonlight Boy because it brought Guts and Casca together if only briefly.
Farnese's jealously gets dialed up when they land on Elhelm and Guts gets confirmation that is indeed possible to cure Casca leading to Guts smiling genuinely for the first time in years, which got Farnese very visibly anxious. Upon exploring Casca's mind Farnese soon witnesses Casca and Guts romance in full and while she is very downcast and jealous of the fact Casca knows a Guts she’ll never know, Farnese eventually reconciles and is happy to reunite Casca with Guts.
Farnese's half brother Serpico is also a Crazy Jealous Guy over her, and even considers to killing Guts but like his half-sister gets over it.
Schierke has some shades of this having a school girl-esque crush on Guts which her fairy Ivalera annoyingly teases her about. When Schierke overhears Guts talking about Casca to Roderick while she is astral projecting with Farnese, Schierke is sadden to learn just how devoted Guts is to Casca but unlike Farnese who breaks away before hearing Guts's comment Schierke finds she doesn't mind since she has connected to Guts in way no one else has. Really like Jill, Schierke's affection to Guts is more closer to daughter's to a father. Schierke is far more viably jealous over how much Isidro likes mermaid girl Isma.
Sonia the reborn Griffith's medium dislikes Princess Charlotte due to her own devotion to Griffith.
Kazuki Ibuse in Bitter Virgin, to the extent that Daisuke plays along with being her boyfriend because he knows she's likely to harm Hinako (the girl he does like) if she isn't placated. Towards the end of the series however, Kazuki cuts Daisuke loose after finally learning Hinako's secret and that Daisuke loves her while having known all about it. She's content to just wait for Daisuke and Hinako to break up, a fate that everyone (up to and including the couple themselves) fully expects to eventually happen.
Noelle Silva from Black Clover. Although she denies her feelings for Asta, she gets jealous when Mimosa starts developing romantic feelings for Asta herself. She follows Asta to the mixer, going as far as working as a maid in the restaurant in order to watch him. She even follows him all the way to Nairn when he visits Rebecca. When Rebecca kisses Asta on the cheek as thanks for saving her siblings, Noelle's upset to say the least.
Pinoko is definitely like this in regards to Dr. Black Jack, and tends to be deliberately rude to any cute-looking woman that walks within ten feet of him, only becoming nicer once she's assured that they pose no threat. The fact that she's WAY too young for him (physically, anyway) never seems to cross her mind.
Played for Laughs: Chizuru is clingy and overprotective towards her Love Interest, Orihime. It doesn't matter that Orihime doesn't return her feelings or that Tatsuki keeps having to protect Orihime from her, she is stubbornly intent on "teaching" Orihime the wonders of the female "way".
Played for Laughs: Soifon's Undying Loyalty for Yoruichi is turned into an obsession. She is angry with Urahara for taking Yoruichi away from her, she's angry with Ichigo for being close to Yoruichi, and in slice-of-life omakes, she engages in covert measures to see Yoruichi naked that reach Stalker with a Crush levels. Anime filler takes this to even more extremes.
Loly and Menoly are obsessed with Aizen. When Orihime is captured, they misinterpret his interest in her as signs that she's become his new "favourite". As a result, they break into her cell, brutally beat her up and later try kidnapping and killing her. They are eventually left absolutely shaken by Orihime who, despite the abuse they heap on her, keeps trying to protect and heal them from the abuse they receive from Espada such as Grimmjow and Yammy.
Anime-filler only: the animators try and turn Nel into one for a single filler scene in an attempt to invent Ship Tease between Ichigo and Rukia. In canon, Nel is only clingy towards Ichigo in the way a young child clings to their protector and isn't jealous of anyone or anything. In fact, in canon, she tells Ichigo to be better to Orihime when Ichigo makes an insensitive comment about her.
In Brave10, Isanami reveals herself to be one towards Saizo as soon as Anastasia appears. She later gains a real rival in Kamanosuke, who is himself a Crazy Jealous Guy.
Brave Raideen: Mari Sakurano views Rei Asuka as a rival over Akira Hibiki's affections. She even accuses her of secretly dating him out of her own insecurities.
Mari:"You're lying! You've been dating Akira for a long time, haven't you!?"
Nazuna displays strong signs of this trope whenever another vampire tries to make a move on Yamori, though it's (usually) Played for Laughs.
When Kabura starts flirting with him, offering to have fun when Nazuna isn't around (and right in front of Nazuna, to boot), she grabs Kabura's wrist and coldly threatens to kill her if she doesn't take her "filthy hands" off her prey.
She later plants a kiss on Yamori while the other vampires are watching, as a way to mark her territory.
Nazuna is less than amused when she learns that Yamori let Akiyama suck his blood in order to heal from his injuries, and remains upset even after Yamori tells everyone that it's fine.
She also stalked Mahiru when he went to Anko's office, and once he left asked Anko what business she had with him, bluntly dodging whatever questions the detective had for her with "I'm asking the questions here".
Her idea of loving someone is to discard everything and everyone, even friends and family, for the sake of being with another. Kiku, however, tends to corrupt her lovers into doing so and manipulating them into thinking they did it willingly, Mahiru being the latest among countless other men who fell prey to her wiles. While discussing love with Yamori, it quickly becomes clear that Kiku will absolutely not yield on this point and that she's unable to see anything else as love.
Then there's Nakuru Akizuki who appears to be this towards Touya, constantly butting in whenever Touya is trying to admit a certain something to Yukito and draping herself on the guy. However what Nakuru a.k.a Ruby Moon is actually after is Touya's magic power, which Touya is attempting to give up to Yukito / Yue who is fading away and will die without - as well as confess his love. Once Touya fully makes clear to Nakuru that she is not to interfere, throws her out of a room where Yukito is sleeping after passing out and Spinel tells her that she has definitely lost, she backs off and limits herself to be The Rival to Yue.
Ran is a very sweet and kind Nice Girl who borders on All-Loving Heroine... unless she's given a reason to be jealous of a girl getting close to her Love Interest, Shinichi Kudo. Then she gets very jealous. Thankfully, her niceness tends to shine back through.
Kazuha Touyama is also a very cheerful and active girl, but no one shall give her reasons to think a girl's getting too close to herLove Interest Heiji Hattori either. It was Played for Laughs in her first appearance where she was hounding Ran under the belief that she was the Kudo person Heiji was so enthusiastic about, and then was greatly embarrassed when the misunderstanding was cleared.
In the Night Baron case, one of the attendants was a karate champion named Satoru Maeda. His girlfriend and companion, Akiko Sayama, was very clingy and jealous regarding him, at some point throwing him outta his room after she saw him oggling a really beautiful wman in a skimpy dress. Since Akiko was the Sympathetic Murderer, however, the last part was a subversion; she threw him out because she didn't want him to find evidence of the crime she had committed.
For Mei, it was the childhood friend Himeko. Ever since she saw Yuzu dash out of the chairman's room, with Mei inside, she has been dead set on separating the two as much as possible. Of course, with them being step-sisters, it's a bit of a feat to accomplish.
For Yuzu, it is Matsuri, an ex Girl Next Door, who came to town solely to see Yuzu and confess her feeling towards her, after discovering her booth photo with Mei and Yuzu in a Held Gaze with each other, she challenged the notion of having a relationship with one's own step-sister.
Claudine: Rosemarie loved Claude and was jealous of any other woman he happened to fall in love with, causing her to lash out in passive-aggressive ways towards the other women.
Shirley Fenette from Code Geass. Too sweet a character to entirely fit this trope: she's more anxiously fretful than jealously clingy — although she does get irked at Lelouch when he hangs up on her. (In his defense, he's usually hanging up on her because his life is in jeopardy at the time. Not that she'd have any way of knowing that.) Nevertheless, she spends an extraordinary amount of her time and energy worrying about him, much of it specifically wondering if he likes some other girl more than her. In the aftermath of the Battle of Narita (which at the time strikes her as remote), her concern for Lelouch's whereabouts above all else is played for laughs — until suddenly it so isn't.
Daimos: Nana doesn't like the idea of other girls getting close to Kazuya, who she has a crush on. When Kazuya falls for the gorgeous Alien Princess Erika, she takes it hard. She eventually accepts that Kazuya's feelings for Erika are valid, though she cries when she realizes that Kazuya never recriprocated how she felt. This is absent in every foreign dub of Daimos (Italian, Filipino and American), because Kazuya is her big brother.
Anna Yamada from The Dangers in My Heart. While usually a carefree and sweet-natured person, she gets quite possessive whenever another girl interacts with Ichikawa too closely. To the point of breaking into an unsettlingly cold, Yandere-like Death Glare.
She glares daggers at him and her friend Moeko from afar after the latter stops her from getting his LINE info and then casually gets it herself.
Ichikawa: Where is this bloodlust coming from...?
Chii excitedly moving up against Ichikawa after he chuckles results in Yamada quietly pulling her away and then insisting that he smiles a lot.
She gets annoyed when he borrows notes with Hara in class (Yamada didn't know that Ichikawa couldn't see the board from behind her), right after Ichikawa intercepted Adachi's attempt to get Yamada to share her book with him.
Yamada: So it's fine when you do it?
During an extra chapter where the class is making portraits of each other, Ichikawa compliments Hara's illustration of Yamada. Then Hara notices her model emitting a Killing Intent towards her with a smile.
She gets shaken up a bit just from hearing him call Moeko by her last name. In the same chapter Yamada is smiling at him after a test, followed by Chii commenting on how popular he must be with girls (After hearing that he got a bunch of chocolate on Valentine's day, not knowing it's all from Yamada). Yamada, still smiling, slowly opens her eyes and angrily stares down a terrified Ichikawa at his desk.
Misa Amane in Death Note, who indicates to Light that if he dates any other girls, even to throw the authorities off their own relationship, she'll kill them with her Death Note. For that matter, Kiyomi Takada later on.
Rin towards Kabru in Delicious in Dungeon. She rarely leaves his side and constantly gets angry and admonishes him for looking at other women, even if that wasn't his intention.
Deltora Quest, Jasmine to Lief in the one aspect that's surprisingly accurate to the books albeit flanderized in the anime. The wild girl gets pissed when any attractive girl flirts with Lief and gives him a Death Glare when he ogles Neridha in the manga, pretty hypocritical when she gets cozy with Dain but that's the nature of a Love Triangle.
Adelaide of Dog Days does not like Valerio's womanizing ways, and will often beat him up or shoot him if he's doing such things around her. She's also implied to be his wife since she refers to "their" grandchildren when talking about their past and Couvert calls both of them her ancestors.
Don't Toy with Me, Miss Nagatoro: The titular protagonist is this in spades. For starters, she doesn't like it when her friends try to get touchy-feely with her senpai or join in to her bullying of him, and her eyes often turn downright murderous when she sees him or thinks he's been too close to another girl for her comfort.
Bulma towards Yamcha frequently in the early series, yelling at his fangirls to buzz off when they show up at Capsule Corp and even punching Yamcha down when she thinks he’s kissing another women (when it was actually an assassin trying to kill him). Later in Z Bulma gets sick of Yamcha (apparently) playing the field and leaves him for Vegeta, who despite being an arrogant jerkass is loyal to her.
Launch in her blonde form towards Tien. Ever wonder why he and Chiaotzu move the world the world around so much? Launch is chasing them. She even robbed a bank just to buy food for Tien Shinhan, and falls into despair when he dies fighting the Saiyans. Launch's blue haired side on the other hand isn't interested in Tien and happily lets him go.
Android 18, while usually laid back still, reacts very badly to any other women interacting with her husband Krillin, even knocking him down when female scientists flirt with him in Bio Broly and calls Zangya a "skank" when the latter calls Krillin "cute" in Budokai Tenkaichi. Dragon Ball Fighter Z takes this trope up a notch with 18 when she overhears Krillin and Yamcha drool over Android 21 and gives them a Death Glare so strong Krillin and Yamcha can feel it from behind, scaring the shit out of them.
Videl is a downplayed version to Gohan, probably most prominent during her high school days where she stalks Gohan and isn't overly happy◊ with the attention he gets from other girls. Videl matures greatly by the end of Z so much that in Super, when she is shown a picture of Gohan kissing another women as blackmail, Videl is completely unfazed and stands by her husband.
Also in the Great Saiyaman Filler there's Angela, who had a big crush on Gohan and was very clingy. She caused trouble in class just so she can join Gohan in the hallway, blackmails him into a date and gets upset when he falls asleep at the cinemas in the middle of the soppy romance flick they were watching. She's even more upset when she goes looking for Gohan after he disappears (i.e slips into his superhero alter ego) and finds him with Videl.
Kale in Dragon Ball Super towards her beloved master Caulifa. All her Legendary Super Saiyan Unstoppable Rage moments are solely due to being jealous of Cabba or Goku for making Caulifa excited, which completely distresses Kale. She almost killed Cabba as well as Caulifa herself when out of control.
Yuka in Elfen Lied, though she attempts (and fails) to grapple with her jealousy throughout the series. The main character, Lucy, is an even greater example, as her grappling with jealousy involves murdering her romantic interest Kouta's family and sparing Yuka's life only because Kouta would hate her if she killed her.
Engage Kiss: Kisara and Ayano both have feelings for Shu, and neither are very fond of sharing him.
Juvia Lockser of Fairy Tail is this towards her beloved "Gray-sama". She flies into a rage when she first thinks Gray is in love with Lucy (even though they've just met) and subsequently attaches herself to Gray whenever Lucy shows up. Still, as far a jealousy goes, it's much more good-natured than the norm Clingy Jealous Girl standard. Lucy being one of her best friends and there isn't a truth to Lucy trying to steal Gray away from Juvia don't help matters, either.
The Familiar of Zero provides the page image, and it's made very clear multiple times that Louise doesn't take any threat to her claim of Saito lightly.
Kagura Sohma from Fruits Basket is extremely clingy toward Kyo, but doesn't hesitate to get violent. She ends up being rejected by Kyo for the main character, Tohru. In Kagura's defense, she's a friend of Tohru as well and not only does get over Kyo choosing Tohru on her own even before Kyo rejects her for the last time... although the author has also said that while Kagura might accept that Kyo chose Tohru, she will never get over him. Not to say that she won't get on with her life; she just will never stop having feelings for him..
Yui Meroko in Full Moon. Emphasis on "clingy", she's always all over Takuto, and in the beginning, won't even let him LOOK at Mitsuki for very long. Even though he's showed zero romantic interest in her, Meroko likes to announce to the world that he is "hers". She eventually matures into I Want My Beloved to Be Happy. In the manga, she's clingy and jealous over Izumi as well, although sometimes he brings it on himself, doing something to make her jealous in order to test her love for him.
Yuno towards Yukiteru in Future Diary. Very much so. She is perfectly willing to eliminate whatever competition she may face by any means necessary.
Played with in Gakuen Babysitters in regards to the twins' parents, Kousuke and Umi. Kousuke initially thought Umi was crying when she was watching his kissing scene from one of his movies (turns out she loves that scene). He also thought she was upset when he had to kiss several girls for a commercial. Umi herself had to tell Kousuke she didn't mind him kissing other girls during work but off-handedly mentioned if he did it in private, she would kill him.
In Girls Beyond the Wasteland, Yuuka shows shades of this once she has a Love Epiphany, getting mad at him for no apparent reason and hitting him from time to time when he's with the other girls.
In Girls Bravo Yukinari has Lisa, Yukina, and to a lesser extent, Miharu, each vying for his affections as his harem.
Kirin of Gourmet Girl Graffiti finds it uncomfortable when Ryou gets a bit too close with anyone other than her. She seems a bit uncomfortable when Shiina mentions having eaten some of Ryou's cooking at school in episode 2. So she starts boasting about the food Ryou made for her when she first visited, along with when she was sick. After bringing food for Kirin's basketball match at Chapter 22, Kirin's teammates wanted to exchange emails with Ryou. Kirin immediately asked Ryou to limit her email exchanges to five.
Reiji (Rage) from the Gravitation manga series is a robot panda-driving Fag Hag fixated on Shuichi, even following him to America and becoming his band's manager because of this obsession.
Rain, mildly, in Mobile Fighter G Gundam. She gets rather passive-aggressive towards Allenby once Allenby becomes the Sixth Ranger. It's exacerbated when Allenby saves Domon during a match—Rain, Domon's official partner, feels inferior in comparison.
Although it's part of an act at first, Flay Allster of Mobile Suit Gundam SEED is definitely this towards Kira Yamato.
In Mobile Suit Gundam AGE Emily gets like this... over Flit being a Gundam pilot, and sets up a challenge between him and adult Ace Pilot Woolf in hopes that Woolf will take it away from him. She also badgers Flit about leaving the Diva and finding a new place to live in a colony. This is quite understandable, however, because they're both under fifteen and she's rather concerned he's going to die in battle.
Hachigatsu Kokonoka Boku Wa Kimi Ni Kuwareru: 99% of the female cast for poor Sakurai, special mentions for Miyako and Yae. Yae goes from sweet to angry to saying some predatory things at the mention of Miyako. Miyako gets incredibly angry and teary at Sakurai for the face he makes while enjoying the baked cookies his teacher made him.
In Hakoiri Devil Princess, the student vice-president, Haru, becomes jealous after she saw the student president, Hayami, become involved with another girl like Maki and thought that he fell in love with latter and she got replaced by Maki as the most cutest girl in the school.
Fu's friend Hikaru in Hana the Fox Girl is like this towards Fu. She sees it as her duty to protect Fu from the advances of any men who might want to seduce her and she and Hana (a child) get into an argument over which of them is closer to Fu.
Heavy Metal L-Gaim: Amu. She never missed a chance to try to lung on The Hero Daba and cling to him with both arms and legs. When the group met Leccee she turned ballistic when Daba showed sings of being attracted to her and trust her. Her enmity did NOT improve when Leccee began to openly show that she liked Daba (it must be said that Leccee is also jealous of Amu, but she is less clingy). Cue many Cat Fights between both (some of them using mechas).
Hello! Sandybell: Kitty Shearer has been eyeing Mark Wellington for a long time and is introduced wearing binoculars so she can spy at his Big Fancy House. When she eyes Sandybell entering, she loses it. When Sandybell and Mark get close, she tries to unsuccessfully ruin Sandybell's reputation many times. She is ecstatic when Mark's father sets up an Arranged Marriage between him and Kitty (as he wants the Wellingtons to escape their Impoverished Patrician status by marrying into the wealthy Shearers), but Mark is aghast and runs away from home. Kitty then harasses Sandybell about his whereabouts.
Hell Teacher Nube, Yukime the Snow Girl. First, she goes all jealous when Nuubee goes into a fancy date with his workmate Ritsuko, but another spirit who had arranged the date in the first place via her powers sees this and punishes Yukime messily andrepeatedly through the second half of the episode. Some time later, Yukime kidnaps Ritsuko and attempts to kill her — but only after having been subjected to an extremely cruelBreaking Speech from her father's Psycho Supporter, who almost manages to convince her to murder her victim and then get together with Nuubee... but Yukime not only is very unhappy about doing this, but she apologizes to Ritsuko and releases her, which ends up in Yukime's own death. She gets better, though. Finally, it's one of the rare cases where the Clingy Jealous Girl actually wins her dude's affections, but only after all of this has happened and Yukime's CJG stint is mostly done for.
Belarus wants to get married married married to her brother Russia. A flashback to their childhood shows that she was even jealous of her sister Ukraine, frowning (though that's admittedly her default expression and it's easy to see it more as childish sisterly rivalry) and clinging to Russia's side when Ukraine gave him his trademark Scarf of Asskicking.
Mostly averted with Taiwan. Her first apparition has her poking China on the cheek and telling him to lay off Japan; however, her interactions with Japan and the other Asians do not have her clinging to him and being a bitch to whoever approached him. Not to mention, while she does argue with China, it's never about Japan aside of that aforementioned one sketch, and she has shown Tsundere-like behavior towards China as well.
Saeko lampshaded it in chapter 6, when Rei was calling him upstairs. She explained to Takashi that girls tend to become jealous when they're not given enough attention from the guys they like, and said he should see what Rei wanted.
Rei is also aware that Saeko harbors feelings for him and doesn't like it when they're alone together. Shortly after Rei confessed her feelings for Takashi, at the Takagi Estate, she found Saeko outside his room and became suspiciousof what she was doing there.
While the two are mostly civil toward each other and seem to get along, Saeko shows signs of jealousy as well. Such as when noticed how close Takashi had become to Rei, and made it a point to call him by his first name, in front of her, to get a rise out of her.
Amazingly, Saya mostly averts the trope, despite once having had feelings for Takashi as well. Whereas she has a strictly platonic relationship with him now. Which doesn't change until she begins to take an interest in Hirano. Such as the time she thought he was coming onto Shizuka when he asked to borrow a condom from her, causing Saya's temper and jealousy to flare until he explained what he needed it for.
His and Her Circumstances: When first introduced, Tsubasa Shibahime is very clingy towards Soichiro Arima, often attacking Yukino Miyazawa, with whom Arima had a burgeoning romantic relationship. Arima, however, doesn't buy on her act and swiftly stops her from trying anything against Yukino. Tsubasa's romantic interest later shifts from Soichirou to her stepbrother Kazuma.
Hori from Horimiya is one, but not in the way one might expect; she's worried that Miyamura might fall in love with another guy, not another girl.
Leo tends to react poorly to seeing Houli with other women, but has so little experience in things like love that she doesn't understand why. When she sees Houli with Anri, before learning they're siblings, Leo is angry for reasons she can't articulate, drags Houli to speak in private, and demands to know what's going on in a manner the narration describes like a child throwing a temper tantrum because this is Leo's first time experiencing jealousy. A later chapter shows a similar reaction to learning that Houli and Helga had spent the day questing together, displaying uncharacteristic anger Houli keeps lampshading and demanding a high-five like the kind he gave Helga... while using enough strength that it knocks Houli flat on his butt. At the very least, she's liable to pout when Houli does something for another woman that she hasn't experienced yet.
Irmgard gets in on this a bit too, being brought to tears from Leo maintaining she doesn't remember her and suggests that she probably forget her because she was messing around with Houli.
Played for Laughs with Aki and Natsumi in Inazuma Eleven, who always flip out when they see Touko gettting too close to Endou, who intentionally does that to annoy them.
Jeanie With The Light Brown Hair: Downplayed and subverted with Stephen. While he isn't possessive towards Jeanie, he fights for her with Robert and dislikes when other men give her attention, because he Cannot Spit It Out.
Mayu Okada from Kaguya Hime. She is very possessive of Akira, and doesn't let men or women near her. She has a sweet appearance but will do anything to get her way, such as pretending to be sick and fainting on the spot to get attention.
Kaguya loathes if any girl tries to get close to Shirogane (with the obvious exception of his little sister). It's to the point she freaks out if he even gets friends that are girls. Ironically, when she finally meets someone else who does have a crush on him (Moeha), the two of them get along great as they both gush about what they like about him.
As for her cousin Maki, it's pretty much a Running Gag in the series that her best friend stole her crush. Because of this, she is constantly unhappy, though her dedication to both means that she is reluctant to break them up just for her own sake.
While Iino openly admits that she despises Ishigami, she starts falling for him as time goes on and comes to resent other girls for getting close to him. In fact, when Fujiwara indirectly describes him as her ideal boyfriend, Iino's response is to actively drag her out of the room.
Kashiwagi is a more restrained example, but Chapter 97 reveals her to suspect her boyfriend of cheating for the smallest infractions (such as eating with and being tutored by Maki). She even goes as far as hiring a detective to observe his movements.
Fujiwara is a very odd non-romantic example. She hates having to teach Shirogane stuff he sucks badly at time and time again — in fact, she has something of a trauma about it — yet she's jealously protective of that role. In Chapter 84, she gives up on trying to teach him Soran Bushi dancing for the sports festival, but she really doesn't like it when she comes back and finds Kaguya teaching him instead. Fujiwara gets Dull Eyes of Unhappiness, laughs mirthlessly, and becomes a rather nasty Passive-AggressiveCaustic Critic. She even gets into an argument with Kaguya over her way of teaching, which somehow devolves into both girls subjecting Shirogane to a Lover Tug of War. However, she is outright possessive of Kaguya as her best friend and refused to let her date Shirogane before realizing her erroneous thinking.
Rina Takamiya from Kaitou Saint Tail is clingy to the point of even literally latching onto him and physically smothering Asuka Jr. in ways he does not enjoy, and she generally treats him like a Property of Love that she's entitled to have just because she can get whatever she wants with violence. She also has a nasty streak against anyone she thinks might be a rival for his affections and will gladly manipulate things around her to eliminate them from the running, resulting in her threatening Meimi and Saint Tail (actually the same person) and ironically making Asuka Jr.'s opinion of her sour even more. She does, however, decide to Know When to Fold 'Em when he manages to Grow A Spine to the point nothing she does will work on him anymore, and it's implied that she actually has developed legitimate attraction to him at this point, but it's far too late to do anything about it, and she has no choice but to be a Graceful Loser when he ends up choosing Meimi as predicted.
May Wong from Kaleido Star counts as a non-romantic (maybe) version of this, since she's very possessive of her idol and prospective partner Leon Oswald and has to compete hard with Sora to become his official partner. She also blames Sora for indirectly destroying her cherished dream to perform with her other idol, ex-Kaleidostage star Layla Hamilton. She gets better, though.
In episode 8, after Ritsu saves Usa from the high school students mocking him, two of the guys in the group mention they could dig the fangirls of this restaurant when they see how beautiful Ritsu looks, and one mentions working there as well. The three girls with them immediately have a gloomy look with Dull Eyes of Unhappiness on their faces as they stare at those two guys out of jealousy.
Ritsu begins to display some of these traits in episode 10 when Hayashi comes back to apologize to Usa. Chinatsu pointing out he's nice to all girls doesn't help things, and when he later mentions to Mayumi that his friend did visit him at the restaurant, Ritsu gets extremely irritated at him and leaves the room in anger.
Miu of Kenichi: The Mightiest Disciple gets very upset when Kenichi starts getting friendly with other girls, or visa-versa, even though she once insisted He Is Not My Boyfriend. The first time this happened with Ma Renka, Miu had no idea why she was getting so worked up.
Hikaru in Kimagure Orange Road, competing with her best friend Madoka for Kyōsuke's affections. It's more of a childish, innocent kind of clinging, except in The Movie where the girl has a total breakdown when Kyōsuke breaks up with her and hooks up with Madoka.
Akane from Kitchen Princess is one for her childhood friend and crush Daichi. When he starts interacting with Najika, she becomes jealous and starts antagonizing her. Her tactics involve becoming a False Friend, doing a Wounded Gazelle Gambit or two, and attempting to drive her out of the school. She even stole a present that Daichi brought for Najika, proclaiming that he's hers, and trying to drive a wedge between her "rival" and her crush. Her behavior diminishes over time and she lets Daichi be with Najika.
Koharu no Hibi's eponymous Koharu is jealous of her crush, and later boyfriend, Akira's glasses. Later on she becomes one after meeting his childhood friend. She did not take well to the fact that Akira's first kiss was with said friend and not her.
Komi herself is a downplayed case; she doesn't mind other girls hanging around Tadano, but if anyone ends up trying to harm him in any way she tends to make herself firmer than she would be otherwise.
Yamai, on the other hand, is an extreme case of this spectrum, being such a yandere for Komi's attention that she is fully willing to kill Tadano to do so. Unfortunately, this only makes Komi dislike her, and Yamai ends up making the usually shy girl uncharacteristically furious and stern.
Ritsu Tanaka from K-On! demonstrates extreme traits of this trope towards Mio in Episode 11 when Mio seems to be spending more time with Nodoka than paying attention to her.
Hiyori of Kotoura-san is one, especially because Manabe shows genuine interest in Haruka without the latter trying anything like she did to win his affections.
Lady!!: Sarah Cannot Spit It Out at Arthur. At one point she expresses jealousy that Arthur may like Lynn, but he's actually been in love with her for years.
Naru may say she hates Keitaro every time until they finally get together, but boy is she ever one towards him.
Kanako, Keitaro's stepsister, is much more obvious about her clinginess towards him, although she does eventually concede him to Naru.
Kaze no Shōjo Emily: A platonic (or is it?) example between Eileen Kent and her son Teddy. She is visibly angry when Teddy makes new friends, and doesn't hide her contempt for his classmates Emily and Ilse. She even physically restrains him from seeing them. It's even worse in the original novel by L. M. Montgomery where Eileen poisoned his dog, because she felt like Teddy loved it more than he loved her.
Tamami of Mahoraba Heartful Days is obsessively clingy to Kozue, and while not particularly violent, she heaps the verbal abuse on Shiratori when he and Kozue get close.
In Mahoromatic, both Mahoro and Shijiko act this way towards Suguru, anytime one of them is getting a little too friendly with him.
Haruko is a textbook example: she's been in love with Takeru since childhood, but refuses to admit it and will vehemently deny it if anyone asks. But if another girl shows affection towards him, or if it looks like he's reciprocating, out comes the Green-Eyed Monster. Meaning, Takeru either gets a slap, or takes a beating.
Downplayed in Inaho's case. Despite her feelings for Takeru, she doesn't mind if he falls for another girl, so long as it's Haruko. So when he inevitably turned her down because of his feelings for Haruko, Inaho accepted it, even though it broke her heart.
Out of Akito's half-dozen or so love interests in Martian Successor Nadesico, the two most successful, Megumi and Yurika, are the clingy jealous type. Fortunately for everyone involved, this never involves violence (except Akito getting Bright-slapped by Ryoko once or twice), or Yurika abusing her powers as captain to punish her rivals. Although it's possible that that just didn't occur to her.
Megumi's jealousy and clinginess took awhile to set in, but once it did, it effectively murdered her chances of getting Akito's affection at all. She actually does gets the seeds of a serious relationship started, but she destroyed it all by trying to take things too far, which utterly repulsed him. Trying to get him to leave the crew of the Nadesico to their fate when they were in trouble didn't help either.
Sayaka from Mazinger Z fell into this trope whenever a beautiful girl started hanging around Kouji: Hitomi, Erika, Misato... The most egregious example, though, is "Minerva X", a Sentient Mecha that loves Mazinger Z and is openly jealous of Sayaka's Aphrodite A.
In Medaka Box, Medaka acts this way towards her childhood friend Zenkichi, and will usually either hit or lecture him if he seems too interested in another girl.
Tohru doesn't like it when Kobayashi spends any time with guys or too much with other dragons besides Kanna. She particualrly dislikes Kobayashi mentoring her rival, Elma, since that means they get to spend more time together than she does.
Saikawa tends to act this way around people her age (be it fellow classmates, Shouta, or Chloe) whenever they have a moment with Kanna. In the case of Shouta, she does it despite fully knowing how Shouta would never approach Kanna in that manner, making it an irrational response of hers.
Lucoa is normally okay with Shouta being around girls besides her... so long as he never shows any interest. If she finds him feeling the slightest hint of potential romantic feelings for another girl, she gets downright scary, with Tohru teasing Shouta to goad her into a fight resulting in her utterly crushing the other dragon and then poutingly squeezing Shouta in her arms.
KimihitoKurusu of Monster Musume is often injured because of Miia's EXTREMELY passionate affection and her inherent jealousy of the other members of his "harem". However, unlike most examples of this trope, Kimihito is often injured because Miia Does Not Know Her Own Strength (being a lamia, she's basically half-human, half-anaconda; most of her internal organs are assumed to be in her human half, so her snake half is almost pure muscle and bone). Her intentional violence is aimed at the people who actually deserve it; that is, the other girls (particularly Rachnera, who is both The Tease and The Gadfly). And it's not just Miia, either. The rest of Kimihito's Unwanted Harem of Cute Monster Girls also display this to limited extents, but the only one who comes close to the Lamia is Centorea Shianus, though the centauride is only open about it when prompted.
Monster Girl Doctor is similar to the above example, though not nearly as pronounced as the standard. Due to his kind nature, which he uses in his profession as a doctor for Monsterfolk (though the vast majority are female patients), Glenn Lietbit has amassed quite a number of admirers, most prominent amongst them being his childhood friend and lover, Saphentite Neikes, who currently works with him as a fellow doctor. In the anime and original light novel, Sapphee is soft-spoken and mild-mannered when it comes to her disapproval of other girls getting too close to Glenn for her liking, only getting physical when sufficiently provoked. In the manga, however, she goes through the comical extremes, regularly strangling others (including Glenn) for even the smallest provocations.
Sakura in Monthly Girls' Nozaki-kun walks into this territory whenever the prospect of anyone else showing interest in Nozaki crops up, to the point she'll deliberately steer Nozaki away from activities she thinks will make him appear attractive to others. Even if it's Mikoshiba: Chapter 76 sees Mikoshiba invite Nozaki to a mixer, the notion of which leaves Sakura terrified. Assuring Sakura that Nozaki won't be talking to any of girls, only Mikoshiba (because Mikoshiba sure as hell ain't going to be talking to any of them either) just makes her angry thinking that he wants to show off his relationship to Nozaki. In Chapter 86, when Nozaki's about to volunteer himself up as a life drawing model for Sakura's art club, Sakura vehemently blocks him from doing so, screaming that no one but her should be able to see his body shirtless.
Ochaco Uraraka in My Hero Academia clearly doesn't like it when her crush Midoriya gets attention from other females. However, since she has trouble accepting her own feelings for him, she doesn't actually break into angry fits or anything, and most of the time she's just too shocked to actually react. That said, she does tend to suddenly make a snide remark or otherwise fall into a Heroic BSoD when she sees any form of subtext concerning Midoriya and another girl.
Shiho Munakata from My-HiME, in regards to her "big brother" Yuuichi Tate. Shiho is an interesting case, because in the My-OtomeElseworld she retains all the craziness, but loses the crush.
Rinko Yamato is so head over heels for Takeo that she finds it bewildering that Takeo isn't more popular with girls. She gets very nervous and competitive when she gets so much as an inkling (real or not) that other girls may be interested in him, such as Saijou in episode 15.
Suna's sister, Ai, has also loved Takeo since they were kids, but planned to wait until they were older so the age difference between them wouldn't be as much of an issue. She takes it badly when she learns Takeo has a girlfriend, going so far as to track them down with GPS at the park. She ultimately steps aside for Takeo and Yamato.
Sakura Haruno and Ino Yamanaka who, in the beginning, are clingy to a T whenever Sasuke is involved, and (in Sakura's case at least) violent when he isn't. Both kind of grow out of the fangirlism by the time Part II starts, and their feelings are more low-key. Although the fanbase refuses to acknowledge or forgive that.
Part II has Karin obsessively pining after Sasuke and Shiho fangirling Shikamaru, but after Sasuke sacrifices her to kill Danzo, she no longer fits this trope. This is averted in the sequel, where she stops pursuing Sasuke and instead supports his relationship with Sakura.
In Negima! Magister Negi Magi, Anna "Anya" Cocolova, Negi's wizard-world friend who is seen very briefly in an early Flash Back, is very jealous about him. At least, she wants very badly to be so, but mostly sits in the hot springs and whimpers, because she's so darn intimidated by the size of a significant portion his Unwanted Harem's chests and later, by their level of combat ability, which makes her fear that Negi will forget about her in the end.
Asuka is this around Ryōji Kaji and Shinji Ikari (notice her particular agitation towards Rei). This is bumped up in many of the Alternate Universe Spinoffs.
Ritsuko also exhibits traces of this behavior towards Rei, whom she fears after the latter starts spending a lot of time with/and earning the favor of her old lover Gendo Ikari.
Interestingly, when Armisael merges with Unit 00 in the manga, the Other Rei tells Rei that while she may not outwardly show it or be fully aware of it, she has some of this towards Shinji as well. It goes on to say that she gets jealous whenever Shinji visits Asuka in the infirmary after her Mind Rape, and that deep down she has a selfish desire to have him all to herself which stems from her loneliness (that parallels to Asuka telling she wants to have Shinji all for herself).
In New Game!, Rin shows signs of this by being upset at how close Aoba and Kou have gotten at the Ski Resort. When Kou gets sick and needs to be taken care of, Rin becomes all too happy to play nursemaid. She also apparently got somewhat jealous when Kou asked Hifumi to call her "Kou-chan"(something only Rin calls Kou) while helping Hifumi talk with others. Interestingly enough, Rin directs most of her frustration at Kou, rather than any of the other girls who might be too close to her.
Miyuki from Nurse Angel Ririka SOS already hated Ririka for being a "barbarian", but when the Foreign Exchange Student Kanou became close to her it gave her even less of a reason to like her.
Ojojojo: It rarely comes up (since most people think Tsurezure is a weirdo and those who know better ship him with Haru anyways) but Haru is incredibly possessive of Tsurezure. Akane (Haru's best friend) once made a joke about the possibility of Tsuruzure cheating on Haru with her, and Haru immediately turned into a Sinister Silhouette.
Almost every member of the Unwanted Harem in Omamori Himari is a Clingy Jealous Girl. The only exception is the Meido tea-cup spirt Lizlet.
Ichika from Oneechan ga Kita acts in this way towards her Not Blood Siblings brother Tomoya. She gets jealous of Fujisaki, a female classmate that he likes. In another episode, after he stares at her friend Marina's breasts, Ichika hilariously slaps her friend's breasts out of jealousy.
Zombie Warthog Lola in Thriller Bark towards Absalom, the only thing that distracted her from constantly trying to marry him was his instance that he was going to marry Nami. Big mistake as Lola went full on Yandere and tried to kill Nami in response (she even ripped up her bounty poster) fortunately Nami managed to befriend Lola and become eternally grateful towards her when Lola saved from Abasalom's second attempt to marry Nami.
Hancock is jealous of the women in Luffy's crew (who she's never so much as seen, only having heard their names), and fears that Luffy will choose them over her (not thatit's likelyto happen).
Charlotte Praliné, one of Big Mom's daughters, is... unhappy when she believes that her husband Aladdin (Jimbei's Number Two among the Sun Pirates) might leave her. Aside of being clingy, however, she does really love him and has said that she'd choose him over her mother any day. And she means it, as she stays by him even when the Sun Pirates join Bege and his crew's plot to assassinate Big Mom.
Charlotte Pudding initially thought Sanji was pathetic and was very eager to kill him at their Arranged Marriage, but after Sanji said some choice words about her Third Eye, Pudding could no longer kill him despite her best efforts, and she was also visibly displeased to see Sanji hold another woman (Nami) in his arms. In the anime, even after her Heel–Face Turn Pudding gets dreadfully jealous of Chiffon (a married woman) feeding Sanji her cooking.
Peach Girl: Sae to whoever attracts her "interest", though it can be argued that she just acts clingy and lovestruck because she is trying to undermine Momo; as well as Jigoro towards Sae. Both Kairi and Toji have displayed certain aspects of this behavior, all of it directed towards Momo; Momo herself is this way towards both Toji and Kairi as well at times.
Kairi has a trio of obsessive Clingy Jealous Girls who once attacked Momo and threatened to set her on fire if she continued taking up Kairi's attention.
In Episode 7, after seeing Sorata take a piece of rice off Yuuko's face, she puts one on hers, prompting Nanami to take that off. A moment later, Sorata sees both Yuuko and Mashiro putting pieces of rice on their face.
In Episode 8, she decides to stay in his room after he says Nanami would get upset seeing her in there. Later, she seems annoyed that Sorata compliments Nanami's bikini, but won't do the same for hers.
In Episode 9, when she saw Rita lying on top of Sorata, her only interactions with him for the next few hours was calling him "idiot" each time they pass each other. Later, after clearing things up, she invites Rita — whom she previously kicked out the dorm — to sleep in her room to prevent a repeat of said incident.
She refuses to talk to Sorata during the first half of Episode 2 due to some out-of-context dialogue regarding Sorata being Mashiro's "first", at least until Mashiro clears it up.
Again in Episode 5 upon moving to Sakura Dormitory because she wanted to see what kind of relationship Mashiro and Sorata had, after Mashiro discussed said relationship in a way that made it sound like "dating".
Misaki also has a bit of this when she sees Jin and Mashiro standing in front of a love hotel in episode 3.
Yuuko spent the entire Episode 7 doing this. She almost instantly disliked Mashiro and Nanami for taking up most of her brother's time, though she eventually softens up to Mashiro after she comes to understand the latter's condition.
"Maid", an Artificial Intelligence designed by Ryuunosuke. When Rita started showing affection for Ryuunosuke, the latter, ever the gynophobic, chooses to spare himself the inconvenience of having to directly communicate with Rita by having "Maid" filter all her messages and love letters... who proceeds to start an online Flame War with her.
In episode 9, both Nanami and Mashiro seem a bit upset at Sorata when they see Rita on top of him in his room when Nanami goes to wake him up for school.
For a non-human example: Hikari (Sorata's first cat) may actually be this to Sorata even. It greatly dislikes Mashiro, who it may perceive to be a rival. But it's implied in the finale when Mashiro and Sorata have an Almost Kiss which Hikari interrupts by scratching Sorata's face. Mashiro suspects the cat was jealous, which is further supported by its angry reaction to Mashiro's kiss on Sorata's cheek.
Koboshi of Pita-Ten often gets very jealous and infuriated when Misha glomps Kotarou, and just as often is shown contemplating her chances with Kotarou and whether Misha is getting more attention from him, particularly when Kotarou won't push the angel away and just lets her hang there.
Ash's Chikorita and Aipom had crushes on him and at first didn't take his bond with Pikachu very well. Oshawott would count as this too, but it's male.
Misty is often mistaken for this. She has shown a lot of hostility towards girls that decide to hit on Ash, though it is usually whenever they do something that either makes Ash uncomfortable (Macey) or when they decide to act like a playgirl (Melody). In the latter case, Melody enjoyed teasing Misty by questioning what her bond with Ash was like, and whenever anything romantic was implied between Misty and Ash, Misty gets immediately riled because Melody kept trying to associate everything she does as an act of romantic interest.
Downplayed in the earlier seasons of Pokémon the Series: XY with Serena, who only showed uneasiness, fear, and worry whenever she thought Ash was interested in another girl. However, encounters with her rival, Miette, tend to invoke this trope as Miette attempts to get this type of reaction from her by teasing her of how she'd take Ash for herself if Serena doesn't act quickly on her feelings for him. Serena usually gets more riled up because Miette keeps blurting it out into the open.
Sakurako falls into this role to various extents in Powerpuff Girls Z, to the point where in one episode she deliberately changes into Sedusa so her Hyde self can take appropriate revenge when she sees Souichirou with another girl (nearly twice, but the PPGZ (in civilian guise) prevent the second occurrence, thwarting what would otherwise have been a Here We Go Again! ending).
In the Pretty Sammy series, Haida is this to Hiroto in spite of the fact that the latter has never once condoned this.
Although it is debated among fans whether her motives are romantic or not, C-ko Kotobuki is this to A-ko Magami in Project Ako.
In Psychic Squad, Aoi, Kaoru, and Shiho, the three main girls of the show, do not like it at all when their supervisor, Minamoto, doesn't pay enough attention to them, or worse, is with another woman. Even if it was against his will...
The Quintessential Quintuplets: Among the titular quintuplets, the ones who exhibit this behavior the most are Nino and Miku after falling for Fuutarou. Ichika later takes it to paranoid extremes to the point she tries to sabotage the others when trying to confess to him.
From Ranma ½ the Ranma's suitors all display one degree or another of this behavior — all of it focused on Ranma.
Akane. Just thinking Ranma is with another girl is enough for her to beat him up.
Shampoo. Given Shampoo's violent and protective behaviour, she views anyone who attempts to get between her and Ranma as an "obstacle" which must be removed (or killed).
Kodachi. She has tried to hurt Akane multiple times. Also she is unaware of Ranma's curse and views his same-gendered form (the girl) as a rival for the affections of his opposite-gendered form (the boy).
Ukyo. In the manga. Perfectly willing to attack those without martial arts skills if they get too close to Ranma, most notably Nabiki during her stint as Ranma's fiancée and masterminding the attack against Miss Hinako for "using her position as a teacher to seduce Ranma".
Reign of the Seven Spellblades: Gender-Inverted with Tim Linton, a Camp Gay male, in "Salvadori": it's indicated during the flashback sequence that takes up most of the second half of the episode that he's so nutty about his crush on Alvin Godfrey that he scares away sympathizers to the Campus Watch who would otherwise join. This is an error by the adaptation: the scene cut half of Lesedi Ingwe's dialogue from volume 3 of the original novels, which states the actual problem was Tim's carelessness with his poisons. Tim's line that Godfrey doesn't need anyone else was originally just an attempt at blowing off her criticism.
Nanami Kiryuu from Revolutionary Girl Utena is fixated on her brother Touga. Also Kozue for her brother Miki. She's extremely possessive of Miki to the point where she physically hurts anyone who tries to hurt or "steal" him. And to a lesser extent there's Wakaba towards Utena.
Rooster Fighter: Piyoko is a baby chick who worships Keiji and wants to marry him, and doesn't enjoy the company of Elizabeth.
In Rosario + Vampire every girl in Tsukune's Unwanted Harem acts like this towards Tsukune to varying degrees (most notably Yukari and Kurumu).
Rurouni Kenshin: At first, Kaoru was very jealous of Megumi, who was better than she was at the traditional female tasks. Sometime before the start of the Kyoto, they move past this and become friends. For instance, see Megumi snap Kaoru out of her Heroic BSoD when Kenshin leaves her for Kyoto. One of the reasons Megumi cites to push Kaoru to go after him is that Kenshin said goodbye to her and not to Megumi, which can be seen as her accepting that she had lost.
Usagi, Fish Eye, An, Beryl, and arguably, Chibiusa act in such a manner towards Mamoru in Sailor Moon. Also, Rei in regards to Mamoru and Tuxedo Kamen at times; as well as Esmeraude whenever Prince Demande is around or even mentioned. An and Ali even act like this towards each other. On the male side there is Prince Demande and Ali both clingy around Usagi and also Umino acts like this in regards to Naru.
In Usagi's case, it's less about being super obsessive and more about her own immaturity and childishness, especially compared to Mamoru who takes stuff in stride. Also, it's kinda zig-zagging: on one episode she was VERY jealous of Rei when Mamoru had to spend some days in the Hikawa shrine since his apartment was under repairs, but on another she completely dismissed Chibi-Usa's claims and distress over Mamoru's kouhai Saori who had a HUGE crush on him.
This is made a plot point in the Super S movie: at some point Usagi asks Mamoru if he loves Chibi-Usa better and is confused by his reply, then realizes something strange is going on...
Also one-time character Janelyn was this to her boyfriend/partner Misha because she was forcibly turned into a Youma alongside him. Once they're debrainwashed, she stops acting that way... but not before seeing Misha train and get along well with Makoto sends her over the edge and attacks them both.
Momo in Saki. After learning that Hisa was now on a First-Name Basis with her girlfriend, Yumi after the two played Mahjong for most of a night (although Hisa's saying "let's do it again today" didn't help), she spent the rest of the training trip shooting death glares at Hisa whenever they crossed paths.
This trope kicks off Sakura Trick's plot; as after moving to high school, Haruka, a bit of a loner, started to get jealous of her friend Yuu's popularity. They decided to do something special to keep their relationship special—in this case, The Big Damn Kiss.
Sekai Saionji and Kotonoha Katsura. Very, very, much so. Although, they both differ on how they express their affections towards Makoto and jealousy towards anyone who might take his attention away from them: Sekai gets angry with Makoto, while Kotonoha goes in passive-aggressive denial.
Otome Katou, who was already a bully Alpha Bitch to Kotonoha and became even worse when Kotonoha started dating Makoto. She gets to the point that she tackles Makoto in a secret spot and has sex with him — when he was dating Sekai behind Kotonoha's back.
Eri Sawachika from School Rumble. Also deconstructed, as her jealousy brings her genuine trouble and almost wrecks her friendships with Mikoto and Tenma. Her more distant friendship with Tenma's sister Yakumo was destroyed over their common interest in Harima, after all.
Momoka from Sgt. Frog fits this trope perfectly. She makes a satellite to spy on Fuyuki's time in the manga, pretends to drown just to get a kiss from him, and buys an island and builds a hotel just to get closer to him. Granted, these are more like typical gambits to get closer to him dialed up due to her money, but add to that her subconscious Anti!Momoka who gets jealous of everyone around Fuyuki - including his sister - and she definitely falls under this trope.
In Shinozaki-san Ki wo Ota Shika ni!, Akina tends to react badly when people get close to Kaede, or Kaede does her normal glomping to others.
Kaede from SHUFFLE! is an odd example. It wasn't Rin hanging out with other girls that caused her to snap but that he was hanging out with other girls and excluding her.
Naoko Ueno is an unpleasant but tragic version of this. A Flash Back shows she’s been in love with the protagonist Shoya Ishida since elementary school and joined in on his bullying of deaf girl Shoko Nishimiya to please him. Ueno then became violently jealous of Shoko upon discovering that she loved Shoya as well and dialled up the bullying because of it. Years later Ueno meets Shoya and Shoko again and tries bullying the latter but is stopped by Shoya who’s reformed, at which Ueno laughs mockingly then runs off and cries with jealousy at her worst fear being confirmed and managing to drive Shoya away from her. Matters get worse when Shoya is hospitalised after stopping Shoko’s suicide attempt, as Ueno beats up Shoko, who she blames for it and refuses to let anyone see Shoya on his sickbed. Then in her Inner Monologue Ueno affirms if Shoya isn’t gonna choose her when he wakes up, she’d rather he not wake up at all. Ueno sums it up in a heated moment with a furiously written message on Shoko’s notebook which outright says “Give Shoya back to me”.
Shoko herself is a much more gentle case of this but she’s still noticeably upset at seeing Ueno with Shoya, and when he doesn’t show up at their meeting place the next day, Shoko assumes the worst and makes a truly pained expression which her little sister Yuzuru notices. Out of the fear of losing Shoya she wears her hair in a cute ponytail, gives him a gift before outright attempting to confess her feelings for him but tragically he misinterprets her words, much to her dismay. Shoko needn’t have worried though as Shoya does reciprocate her feelings and actively spites Ueno.
Chocolat and Tira in Sorcerer Hunters will punish the hell out of Carrot for so much as looking at or attracting the slightest bit of attention from a woman who isn't them.
Fiona from Spy X Family is a surprisingly and hilarious case of this. She's introduced as a cool and cold Consummate Professional and Ice Queen who berates Loid for letting his cover family make him soft; however, when the telepathic Anya looks inside Fiona's mind, it's revealed she is head over heels in love with Loid and wants to be his wife badly (just him briefly holding her hand leaves her hot and bothered). She's hatefully jealous of Yor and seeks to replace her, despite knowing full well Yor isn't Loid's actual spouse, just the prospect of being his fake wife is enough for Fiona. Like Yuri for Yor, Fiona is treated sympathetically with her infatuation being genuine and she would doubtless be a loving wife to Loid; but unlike Yor she wouldn't be a loving mother to Anya (and would put her through hell), which is why she loses out.
Miu from Strawberry Marshmallow reacts like this whenever Nobue shows too much attention or admiration for one of the other three girls—which happens regularly. It's likely non-romantic, although with Miu all bets are off.
Eila Ilmatar Juutilainen from Strike Witches is incredibly protective of Sanya V. Litvyak. She will jump in if anyone so much as looks at her, and will also volunteer for any mission Sanya has been assigned to.
Asago in Tokyo Crazy Paradise is like this towards Ryuji to the point of shooting Tsukasa's brothers when she admits her feelings for Ryuji.
To Love Ru. Oh yes indeed. For those of you who like names, Run's two halves to Rito and Lala respectively. Although the male half gets forgotten as time goes on.
Christine Hanakomachi from UFO Baby seems to have two personas hiding inside her: the meek gentle girl who adores Miyu Kozuki as a friend, and the crazy devil capable of superhuman feats that would murder anyone who tries getting "romantically close" to Kanata Saionji (namely Miyu herself, though non-intentionally). Both of them are aware of this, and have taken advantage of it. For example, in one episode the cast is shrunk, so Kanata pretends to get romantic with Miyu while standing in front of the button that will turn them back to normal size, causing Chris to attack with sufficient strength to press the button.
In Umi Monogatari, Urin is this towards Marin, becoming jealous and scared about Kanon's intrusion and worried it will shatter their sisterly bond. Justified since she's a little girl.
Lum in regards to her "husband" Ataru Moroboshi. In her defense, she wouldn't care if he looked at other girls; she just wants him to stop throwing himself at every woman he sees.
Ryōko Mendō, aimed at her brother Shūtarō and his arch rival Tobimarō who is TERRIFIED of her for the exact same reason Shūtarō is.
Carla from the final arc goes beyond this to full-fledged yandere when it comes to her Childhood Friend Rupa. After learning his great-grandfather had set up an Arranged Marriage, she began alternatively showering him with gifts bearing her likeness and violently attacking him whilst demanding he love her back.
Usagi-chan de Cue!!: Mimika can't get enough of Haru, and whenever Haru inquires about Inaba or Miku, Mimika tears up and flees.
Momoko from Wandering Son displays this behavior toward her childhood friend Chizuru and often acts very upset when Chizuru pays more attention to other people. Still, Momoko is not above giving Chizuru a piece of her mind when she thinks her friend has done something stupid to other people—which is quite often.
Despite her insistence, Mako of You Are Totally in Love With Me, Aren't You? is largely attached to her friend Sayaka. In one chapter when the class representative offers to help Sayaka study for an upcoming exam, Mako gives her a Death Glare which compels the class representative to invite both of them to a studying group she had with another student.
Yubel from Yu-Gi-Oh! GX is more of a clingy jealous intersex dragon demon person, but they very much fit. They are also a body-swapping parasite jealous of Jaden’s friendship with Jesse.
Zuzu from Yu-Gi-Oh! ARC-V is easily angered by Aura flirting with Yuya and calling him her soulmate, hitting him with her Paper Fan of Doom whenever it happens in front of her despite Yuya never initiating it or even being romantically interested in Aura. However, this is eventually phased out as Aura leaves the recurring cast and the show takes on a more serious tone.
In Yuri is My Job!, Kanoko is an interesting case. She's fully aware that her love for her best friend, Hime, is unrequited, and doesn't make any attempt to confess, since she doesn't want Hime to treat her like any of the other throngs of Hime's admirers, whom Hime doesn't care anything for. What Kanoko is fiercely protective of is her status as Hime's Only Friend, so when Hime reconciles with her old friend Mitsuki, who is also her schwester in the Liebe Girls' Academy salon where the three work, Kanoko becomes jealous of Mitsuki.
Yuriota ni Yuri wa Gohatto Desu?!: Invoked. When Fuyu distracts Ririka to keep her gyaru ways from rubbing off on the elegant young ladies at their Catholic school, Ririka mistakes her for a Clingy Jealous Girl, even though Fuyu is mainly worried about "protecting" the other girls from gyaru-ification.
Several cases in the manga Zekkyou Gakkyuu (each chapter is a short horror story). The greatest examples are:
Bloody Valentine: In which the girl Misaki is dating a guy, Naoyuki, but starts to receive letters threatening her and also notices a creepy girl looking at her from afar. On Valentines Day, the girl confronts Misaki and the guy approaches them... Then it's revealed that it was all in Misaki's head. The letters were made by Misaki and she was giving them to the girl who was Naoyuki's girlfriend and who she had hurt to the point she was wearing a bandage over her eye. When Misaki confessed, Naoyuki had rejected her but she was unable to cope with it, so she truly believed that they were dating.
In The Sacrifice Club, Ayuko was so jealous of Yuuka being friends with the guy she liked that she was willing to follow an ancient ritual from a legend to make Yuuka disappear. The way she smiles at Yuuka while performing the ritual is one of the most chilling images ever.
◊ with the attention he gets from other girls. Videl matures greatly by the end of Z so much that in Super, when she is shown a picture of Gohan kissing another women as blackmail, Videl is completely unfazed and stands by her husband.
