Demon Heart

For generations, every woman in Naoko's family is born with a demon inside. When Naoko's demon emerges, she chooses to follow in her mother's footsteps and use her powers to protect Japan. But her road will bloody and filled with challenges as she uncovers an underground war that may tear Japan apart. Filled with intense battles and gory details, the seemingly interesting story fell short.

The full review can be seen here:

https://forums.onlinebookclub.org/viewtopic.php?f=114&t=104449