Anime fans get super invested in the pairings they like, and sometimes even more so in pairings they do not like. For every beloved anime couple, there exist anime characters who ended up with the wrong person. Sometimes, a perfect anime finale gets ruined by bad anime couples who never should have gotten together. A few of these ill-suited anime pairings appear below, so be prepared for some SPOILERS if you read on.
Many different reasons can help to explain why a relationship might be totally unappealing. Sometimes, the reason is obvious, like with Rin Kaga and Daikichi Kawachi of Bunny Drop. Even though Daichi raises Rin since she was 6 and he was 30, the two start a romantic relationship when she's 16. In other cases, the reasoning is more subtle and more subjective. A lot of people think Ichigo would have been better off with Rukia in Bleach, and get very passionate about it - but others like his canon choice to marry Orihime.
All of these poor anime pairings are up to debate, but the fact people debate them at all is not a great sign for their longevity.
There's nothing especially wrong with Kayo Hinazuki's ultimate relationship, which is with Hiromi Sugita, a childhood friend who has always been sweet to her. The problem isn't Hiromi or the dynamic between Kayo and Hiromi. The problem is that the entire series builds up to a relationship between Kayo and Satoru Fujinuma, the protagonist.
Satoru goes back in time to stop Kayo from being slain by an unknown maniac who turns out to be their teacher. Over the course of his repeated attempts to rescue her, the two develop a genuinely meaningful bond. His final try is successful, but it ends in Satoru being severely harmed and entering a coma. He spends the next 13 years on life support, and by the time he wakes up, Kayo is already married. He's happy to see her happy, but the missed opportunity for these two still stings.
When Rin Kaga and Daikichi Kawachi first start getting to know each other, Rin has recently lost her father, and Daikichi, her father's adult grandson, decides to adopt her. Nothing about this scenario sounds even remotely romantic, so when the Bunny Drop manga turned the father-daughter duo into an official couple, some readers voiced their displeasure. At first, Daikichi rejects the 16-year-old Rin's request to get married and have children, but as soon as they learn they aren't biologically related, he changes his mind.
Who else could Daikichi have dated? Well, he tries to get into a relationship with a woman named Yukari, but she rejects him because her teenage son isn't into the idea of her being in a relationship. In another creator's hands, Yukari might not have rejected him and could have had a heart-to-heart talk with her son. Or, Daikichi could date literally anyone else in the world besides the teenage girl this now 40-year-old man has raised over 10 years.
The end of Yu-Gi-Oh! GX features one of the most bizarre, unsettling end game relationships in the history of anime. Protagonist Yuki Judai (known as Jaden Yuki in the dub) follows his friend Johan (Jesse) Andersen into an alternate dimension that vaguely resembles Hell. There, the being who took Johan possesses Judai and forces him to commit a plethora of atrocities, which include enslaving and slaying thousands of sentient card spirits and wiping out nearly all of his friends. While the victims do come back to life, the experience remains.
Who is making Judai do all these awful things? As it turns out, it's his girlfriend from a past life, Yubel. She took Johan out of jealousy because Judai was showing him too much affection. She made him eliminate all those people for a series of convoluted reasons that boil down to wanting him to accept her back into his current life. This means literally living in his body like a parasite since Yubel lacks her own physical presence.
Judai accepts her terrible proposition on the grounds that in his past he had apparently loved her, and she had made some serious sacrifices for him. For the rest of the series, Yubel just sort of lives in his body, helping him win card games and warping his personality such that the formerly friendly guy completely isolates himself from everyone who cares about him.
To be fair to Judai, Yubel would probably have ended him if he hadn't accepted the relationship on her terms, but that doesn't make it any less horrifying a conclusion. Ideally, Yubel would have been defeated by card games, and Judai could have gone on to continue his close relationship with Johan. Or Asuka, who he showed vague interest in at one point. Or Shou or Kenzan or Manjoume or literally any other character besides the person who treated him so poorly.
Kyousuke Kousaka has multiple romantic options, but he chooses to pursue his sister, Kirino, instead. The two even have a wedding - not a real one, since siblings can't legally marry, but a ceremony designed to celebrate their romantic feelings nonetheless.
Not only is this inherently unappealing to the majority of viewers, but it's still not a great relationship even if you are an inbreeding fan. Kirino is consistently cold and cruel to Kyousuke, showing no appreciation whatsoever for all the times he goes out of his way to help her. What's more, Kyousuke actually has a healthy relationship with Kuroneko before he randomly develops feelings for his sister, so this poor girl gets shunted to the side.
With a title like My Little Sister Can't Be This Cute, it's not like this development comes out of nowhere, but in the story itself, it feels arbitrary and unfair.