Resolved Female Protagonist is betrayed and joins the Demon Army

As the name says, I remember that the female protagonist being exceptionally strong but cannot use exorcist powers that her family can use. She has two souls one of which being a reincarnated and they remember that the world she is in is a part of a game.
She is suppose to be a supporting harem character while her little brother is suppose to be the main character, and he is a reincarnated.
While she suspects that nothing will happen to her due to her in the game nothing happens to her through out the entire game, she is exiled out of her family, is push off a cliff if I remember correctly and is presume dead. She then makes a deal with a demon to find a new home, sacrificing the reincarnated one soul in exchange for it. But is double-crossed and just as she was about to be killed she is saved by a general of the demon army. She swears an oath to him as long as she has a place to be and serves as a part of that general's army.
She is ultimately the key figure of the many skirmishes she takes part in, due to being human and is able to kill most exorcists due to their powers only affecting demons only, not humans.
And that is all that I can remember I'm not sure if that is a wn or if it has been dropped but I liked it.

 

........ interesting. I want to know the title too ...

 

Katahane no Riku
That seals the deal

 

Thanks that's the one

 

Katahane no Riku

 

Katahane no Riku

 

So is this worth a read? I usually don't read JP novels as the MC are all beta wimps, lazy or disagreeable to me in some other way.

 

This only mean you haven't browse long enough. Those are traits of newer JP novels

 

If you want to read it yourself, here the chapters (before it get deleted due to LN publishing and migration to paying alphapolis site)

http://web.archive.org/web/20151218110011/http://ncode.syosetu.com:80/n0881ck/
http://web.archive.org/web/20160820074935/http://ncode.syosetu.com:80/n0881ck/