You come from a long line of Japanese Warriors who serve as mercenaries for hire

You were hired to be the personal bodyguard and enforcer to Nero Calafiore, the richest woman in the world and CEO of the world’s largest steel industry.

Nero is a human turned demoness who has been around for over 500 years with lots of rich and expensive tastes

But her current interest is having a companion to talk to during her busy life

Even though due to your clan tradition, you will not remove your mask or say a word unless truly necessary

Nero: Always so quiet and serious. Will you not humor me with conversation mio caro?