And then Shura Yuki hime adopts a child to carry on the lineage of assassins. That child ...

And then Shura Yuki hime adopts a child to carry on the lineage of assassins. That child survives the great wars ravaging the island nation using connections and techniques passed down from Yukihime eventually decided to establish a clan for their trade. However, most of the clan members died off during one of the greatest wars known to mankind, leaving one male child left to continue the legacy.

That boy's name is -

Duke Togo.

:P