A to F (Alpha Bitch, Bitch in Sheep's Clothing, Didn't Think This Through) | G to L (Gold Digger, Humiliation Conga) | M to R (Obnoxious In-Laws, Relationship Sabotage) | S to Z (Spoiled Brat, The Unfavorite, White-Collar Crime)
In some episodes, the antagonists will adopt a pleasant persona around other people, but then reveal their true selves toward their target or enemy, or while no one else is looking. The motives for these characters to hold an act vary, but these often boil down to money, feeling superior to others, or stealing someone the protagonist cares about. Therefore, this warrants MoniRobo a Bitch in Sheep's Clothing subpage.
- On the day of an important presentation, she tries to bring me down
: Ayane Azato may seem like a nice and hardworking girl but it's all an act; she often bullies Nano and dumps her workload on her on top of trying to sabotage her presentation to win a contest. Later on, Masayoshi revealed she had a history of doing this. - My new wife was abusing my daughter behind my back: Kayoko seemed to be a kind woman to Tatsuya and even his autistic daughter Minori, who instantly liked her. However, she changed her demeanor upon marriage, and eventually, the housekeeper Mrs. Takeda revealed that Kayoko started abusing Minori behind his back.
- My house burnt down and my mother-in-law tried to blame it on me: Hanae's mother-in-law seemed to be caring and silent, but she wanted to ruin her marriage to Masato to the point of trying to burn down the house to either force a miscarriage on her or make him divorce Hanae.
- My husband's true personality was revealed during my pregnancy: Kohei appeared to be a decent, hardworking young man but after marrying Matsumi, he turned out to be an abusive monster towards her, forcing her to do the chores even while pregnant with twins. When he calls her only for her cousin Homura to pick up, he retakes the act.
- My sister's fiancé doesn't want me at their wedding because I'm disabled: Daisuke Nishio seemed to be a decent, respectable rich guy around his fiancee Tomomi but acts cold and dismissive towards her paraplegic older brother Koji. He was flirting with a female coworker while engaged to Tomomi and took part in an embezzlement scheme along with his company's head manager.
- My best friend's fiancée said, "You make me sick. Don't come to our wedding!": Emi comments that her best friend Hisao had poor taste in women, as these were the same type of women who acted nice in front of their men but are actually rotten when no one was looking, and intuits the same on his latest fiancee Risa, who is also homophobic.
- Here's what happened at my friend's wedding after he dumped my precious sister...: Katsumi's best friend Yasuo seemed to be a nice (if bumbling) guy, but it's revealed to be an abusive jerk towards his previous fiancee Emika, who was Katsumi's sister.
- My daughter comes to me crying for help after being abused by her stepdad: Mr. Yamashita presented himself as a good husband around his wife Kyoka, but whenever she isn't around, he routinely molests his high-school stepdaughter, Sato.
- My husband thought I did nothing because I was a house wife, so I divorced him [sic]: Jin Ehara seemed to be a good boss and a loving boyfriend when Saori dated him, but after they married, he revealed himself to be a sexist abuser who acted like, in Saori's words, "a dominant Showa-era husband". He treated her like a housemaid and dumped all the childcare chores on her because he saw it as "a woman's job". It turns out the reason for being who he is was because he learned it from his father.
- Husband left me and got remarried…: Ryuta Tekito seemed to be a nice man when he helped Hanayo up to her feet in a Xerox machine accident. However, he became an utter jerk once they married; it turns out he only married her for her family's money.
- Spoiled son ran over me with his car and tried to pretend it never happened: Eiji Murakami seemed to be a nice guy while meeting protagonist Eri Okazaki until they started dating; he became possessive and controlling towards her. When she told him to break up with her while he drove her home, he grabbed her arm and he ran her over in response when she broke free from his grasp.
- My husband and his mother treated me like a slave...: Takashi Yamada seemed like a nice, understanding guy towards Manami while they dated for a year, even going with her to her parents' graves. However, once they married and moved into his diabetic mother's house in the countryside, both mother and son started to bully Manami by putting her down for everything she does no matter how hard she tried. Later on, Manami eavesdrops on them and finds out the reason Takashi married her was that "she seemed weak" for not having a family to turn to; he wanted a wife who would do as he said, which drives her to run away.
- My mother-in-law finds out that I'm pregnant, , and schemes something terrible... [sic]: Nano's mother-in-law Marie acted like a kind mother around her son Masayoshi to cover up her abusive and controlling behavior toward Nano, which she justified under the excuse of "making her a good wife". However, Masayoshi eventually finds out and chews his mom out for it before leaving with his wife.
- "My sister married a two-faced liar...": Masahiro seemed to be a nice guy at the mixer party he attended. While he had a violent temper, he kept it to a minimum to make her think it was a one-off incident. At their wedding day, he forbade Yuuko's sister Kyouko and the rest of her family from getting in touch with her, and showed his true colors three weeks later by forcing her to get tattoos so no one else would marry her and treat her like a slave.
- "Teaming up with my mother-in-law to punish my sexist husband": Yoshihiro seemed to be unassuming when dating Emi and proposed to her. However, after he married her and they moved to his mother Satoko's house, he showed his true colors as a sexist domestic abuser.
- "I went out with this boy, but he was just using me and had another girlfriend": Natalia Mallard's first boyfriend Mitch Fleming seemed like an understanding boyfriend, mainly helped by his reputation as the school's tennis star and his good looks earned him popularity with the girls, especially during their first time. However, Natalia started to feel something was off with the idea of such a teen heartthrob dating an unpopular girl like her. Furthermore, her doubts were confirmed when her friend Thea tells her that Mitch had another girlfriend in another school named Brooklyn.
- "I got blackmailed by my lousy boss, but someone finally comes to my rescue…": Executive Rena Yakamashi seemed like an okay boss when Masayoshi was sent to inspect the building, even notifying him of seemingly flawed employee Ms. Shimizu. However, he made more thorough research on the company and found out it was all an act; Rena blackmailed Ms. Shimizu and brought up her status as the CEO's daughter to silence her and had everyone force their workloads on her upon finding out Shimizu joined to provide for her brother.
- "My daughters spy on my husband and expose his affair!": Charako's husband Masashi seemed to be an okay husband but it was all an act to cover up his cheating, which was discovered by her daughters Mika and Moka when they readied to do it in the shower. Furthermore, both girls had the lovebirds locked inside the bathroom after snapping pictures of their affair to expose it to Charako.
- "My boyfriend got my subordinate pregnant...": New employee Manami seemed to be an unassuming Nice Girl since she started to work at the company under Satsuki's wing. However, it was all an act when she attended a drinking party and everyone got hammered; when Satsuki passed out, Manami sleeps with her fiancé Takuya and becomes pregnant with his child.
- "Married sister with bruises all over her body": Takeru seemed unassuming and kind at first glance, but when Koharu became suspicious of him after the last time she talked with her sister Sae, she found out he was a Domestic Abuser who looks down on women and hits them whenever they didn't do as he said. Moreover, he also tried this with a previous wife before marrying Sae, but she saw through his crap and left him.
- "She thinks she stole my fiancé but the person she slept with was...": Moemi seemed to be a good friend towards Kanako while the latter announced her marriage to Mr. Inakawa. Later on, she reveals her true colors by sleeping with Mr. Inakawa and convincing him to marry her instead to spite Kanako.
- "My wife turned up when I was on holiday with my lover…": Takeshi seemed to be a fairly decent guy when Kyouko worked as a receptionist, but once they married and she quit her job as per his request, she soon finds out he's a sexist bastard and a shameless cheater who had his affairs with a woman named Miki right in front of her. Moreover, he was so focused on his mistress that he callously ignored his family's concerns about his dying mother. As a result, his father disowns him at the deceased woman's funeral.
- My best friend stole my fiancé...: Rena was friends with Sakura since high school. Not only did she stood up for her when she was bullied but also gave her dating advice when she met Ryuuji Sugita. However, Sakura found out it was all an act when Rena invited her to her wedding and the groom was Ryuuji; it turns out she was only Sakura's friend to make herself look good. Moreover, she even accused Sakura of cheating to manipulate the man into marrying her instead.
