Two heads are always better than one and having a partner in crime can be handy. The same goes true for anime and even other entertainment media. The power of siblings is not to be trifled with, assuming they aren't constantly bickering with each other, of course. There are plenty of them in many different anime, but not all have powers or make an impression.
There are a lot of anime siblings with screwed up relationships out there. Some of these messed up anime siblings could seriously use some family therapy. Sasuke Uchiha's primary goal in life is to murder his older brother Itachi. Why is this so important to him? This is screwed up enough, before you start layering on the complications.
Incest is a subject that is not usually discussed about in real life, as in many people's eyes, it is considered disgraceful and forbidden. Nonetheless, it still happens in real life so who are we to say that true love doesn't exist. After starting to watch anime, which I recently just started watching, I realised that animes take incest to be a topic of interest. Why am I SO into the topic of incest is something I've always asked myself.
This week, we're talking about the elephant in the anime viewing room. It's a particular type of "forbidden relationship" that crops up on a pretty regular basis, where dudes have a chance at sleeping with their sisters. I'm not going to pretend to know why this trope is common beyond a lot of theorizing and supposition, but the number of different sister types in anime is boundless. There's idolized little sisters, protective older sisters, cousins raised as sisters, step-sisters, and adopted sisters. The last few are supposed to be forbidden but viable love interests that don't cross the "biological line", while the blood-related examples' affections are usually played for titillation against a protagonist who can't seem to do much about the inappropriate advances.