«The Book of the Shadow» by Carrie Asai

When I was six months old, I dropped from the sky – the lone survivor of a deadly Japanese plane crash. The newspapers named me Heaven. I was adopted by a wealthy family in Tokyo, pampered, and protected. For nineteen years, I thought I was lucky.
I'm learning how wrong I was.

THE OLD HEAVEN KOGO DIED WEEKS AGO.

I AM A NEW PERSON – TRAINING TO STAY ALIVE. THE PEOPLE I TRUSTED, I NOW FEAR. THE PEOPLE I TRUST NOW, I AM PLACING IN DANGER.
I'M TOLD A GOOD SAMURAI CAN MAKE HERSELF INVISIBLE. AND I WANT TO BE INVISIBLE RIGHT NOW… TO EVERY PERSON EXCEPT ONE.

I AM SAMURAI GIRL.