Black Roses Rewrite
Autumn Urameshi is the younger sister of Yusuke Urameshi, she isn't as known as he is this is due to the fact that nobody ever sees them together. Plus she claims to be an only child all the time, to avoid being thrown into the same group as her brother. Since she wants to not be feared for some stupid reason such as who her brother is. However despite that, she and her brother are close in a way that neither of them knows the depth of. When Yusuke's death ends up setting Autumn down a path that ended up being more of a side effect of being related to him, making her having to adjust and adapt to the expanding world around her. Although luckily she has friends to help her a bit and keep her safe from the growing dangers that come with needing to keep her idiot brother's childhood friend safe from the dangers of being dear to Yusuke.
Disclaimer: I don't own anything of YYH, that credit goes to Yoshihiro Togashi. I do however own Autumn and Yoshi, along with anyone else not originally created by Yoshihiro Togashi.
This is also posted on fanfiction.net under my account there.