Talk:Summer Rose/@comment-10380701-20150530000357/@comment-10380701-20150530014036

China. The Musou franchise really made me learn the massive difference between Chinese and Japanese culture, despite being repetitive ;)

Essentially, the concept behind it is that they're not blood-related in any way whatsoever, but they treat each other as if they're siblings. In older cultures, that's a big thing. As family is super important.

It's a more archaic thing to do, as in the modern world, the closest thing you can get into that is via sibling-in-law. And that only occurs if your brother/sister marries someone.

But this is all speculative. Zero proof exists that such a concept is viable in Remnant.