Most folks know at least one person who likes to try and insert themselves where they weren't invited, and sometimes that's just fine while other times it can be a bit of an inconvenience. Some embarrassing scenes can occur if someone is especially eager to feel like part of a group, and the atmosphere can become uncomfortable.
Even anime characters have their moments of awkwardly trying to tag along with groups that they technically aren't a part of. A compassionate group will grin and bear the disruption until things are back to normal, but other groups may be antagonistic. In some cases, people might not even notice the strangeness at all.
10 Misao's Jealousy Makes Her Act Out (Lucky Star)
Misao Kusakabe's a bit dim-witted and seems almost completely unaware that the things she says in Lucky Star are often confusing or poorly thought out. Sometimes, she even looks for validation from others for her statements. One of the first things we learn about her is that she's jealous of Kagami spending a lot of time with Konata Izumi even though she's in a different class. Since Misao has been in the same class as Kagami for a long time, she thinks that Kagami should show some more loyalty and uses that as an excuse to hang around her.
9 Yunyun Is A Loner But Not By Choice (KonoSuba)
Although Yunyun is a talented and determined Arch Wizard in KonoSuba, her crippling anxiety and shyness make it difficult for her to make friends. This allows others to easily take advantage of her and she lets it happen even if she knows they have bad intentions. Yunyun has the habit of helping people but running away in embarrassment before they can properly thank her, leading to the townsfolk believing she doesn't like people. On the contrary, Yunyun would be thrilled to be accepted into more social circles.
8 Twin Turbo Insists She's Tokai Teio's Rival (Uma Musume: Pretty Derby)
Objectively speaking, Uma Musume: Pretty Derby's Tokai Teio has the speed and skill to outdo Twin Turbo, but Turbo doesn't let that deter her. Twin Turbo is determined to show Teio that she's a horse girl worth watching and goes out of her way to get Teio's attention, often with humorous results.
Her energy is a little too much to handle and she doesn't think things through, but she's definitely got the spirit to match her lofty goals. Twin Turbo might never defeat Tokai Teio but that won't stop her from showing off.
7 Brief Frequently Tries To Involve Himself With Panty (Panty & Stocking With Garterbelt)
Outside of trying to insert himself into Panty and Stocking's affairs, Brief also shows the tendency to want to fit in more at school, as evidenced by his behavior towards Barby in "The Turmoil of the Beehive." Despite the fact that Brief knows he's an outcast, he's still motivated to make himself relevant and tries to get others' attention—especially Panty, who he's helplessly in love with. But more often than not, Brief is ignored or used as the butt of a joke.
6 Oishi Attempts To Elicit Hinamizawa's Trust (Higurashi No Naku Koro Ni)
Being a detective from nearby city Okinomiya, Higurashi: When They Cry's Kuraudo Oishi isn't exactly the friendliest face around Hinamizawa. The villagers tend to be wary about him because he frequently comes poking around looking for clues about the suspect behind the Hinamizawa dam project murder. With this end in mind, Oishi shamelessly approaches villagers and uses his status as a police officer to intimidate them into complying with his requests. But before he takes that tactic, he'll often try appealing to their emotions first.
5 Tohru Made A Manual Of Human Social Norms (Miss Kobayashi’s Dragon Maid)
As a Chaos Dragon, Tohru probably never imagined she'd settle down in human territory, but then she fell in love with Kobayashi and her whole world changed. Tohru initially tried to keep using dragon logic after she started living with Kobayashi as her maid, but after Kobayashi made it clear that Tohru needs to blend in with society, Tohru accepted the challenge wholeheartedly. Part of her study of human behavior included making her own manual with notes on how humans act daily, all so she could impress Kobayashi.
4 Nico Is Desperate To Be Popular (Love Live! School Idol Project)
While she puts on a confident front, Nico Yazawa is determined to be a successful and popular idol in Love Live! School Idol Project. She regularly studies the routines of current popular idol groups and even founded the Idol Research Club before passing off the presidency to Hanayo after she graduated.
Nico's infamous for completely changing her personality when she goes into "idol mode" in an attempt to appeal to fans. Her idol persona is overly sweet and cutesy and ultimately comes off as annoyingly fake.
3 Natsuhi Yearns To Be Accepted As An Ushiromiya (Umineko No Naku Koro Ni)
The Ushiromiya family is an elite clan headed by Kinzo Ushiromiya, who sired two sons and two daughters to carry his family name. The right to wear the Ushiromiya family crest on their clothing is a privilege only for those who are blood-related to Kinzo—meaning the wives and husbands of his children are out of luck.
Natsuhi Ushiromiya is Krauss' wife, who is Kinzo's eldest son. Umineko: When They Cry shows her as exceedingly proud to be part of the family, even more so than some of the blood-related members. Despite her pride, she's barred from wearing the crest and often tries to stand out by being loyal and protective.
2 Nano Frets Over Whether People Can Tell She's An Android (Nichijou)
In Nichijou, Professor Shinonome (or simply "Hakase") is an 8-year-old super-genius who built Nano Shinonome on her own at her laboratory. Hakase amuses herself by making random, nonsensical modifications to Nano’s body without her consent and stubbornly insists that Nano keep wearing the largely useless key sticking out of her back. Nano's body modifications sometimes malfunction in the company of others and embarrass her, but the other characters don't seem to notice or care.
1 Mishima Uses The Phantom Thieves To Try & Stand Out (Persona 5: The Animation)
Known as a "zero" at his last school, Persona 5's Yuuki Mishima is a character who's used to not standing out, but despite that, he wants to feel important. After meeting Ren Amamiya and figuring out he's the leader of the Phantom Thieves, Mishima inserts himself into their affairs claiming to be a Phanboy who will propel them to fame.
For a moment, Mishima almost gives in to his darker desires to use the Phantom Thieves for his own selfish aspirations of fame and notoriety. Luckily, he learns from the experience and supports the Phantom Thieves with integrity.