Character study: Satoru

Okay, here we have a new character that I've designed.

Name: Satoru
Age: 22(at death)
Occupation: Elite Shinobi
Height: 5'9
Weight: 136 lbs.
Weapon: Long katana
Bio:
Satoru was a shinobi from the same ninja clan as Kuro Vega. He actually grew up with Vega, teaching her several techniques that he knew, including cryomancy. When he and Vega were old enough and had enough expericence, they were put on a special ninja squad with another experienced ninja known as Nanbu. Together, they climbed the ranks of their clan until they were three of the top Shinobi.

Then, one day, Vega left. She could somehow see the evil that had influenced the clan and abandoned Satoru, leaving him and Nanbu as their clan's only leaders.

About 2 years later, Vega came back to the clan's village, but with a blue-haired companion. Together, they slaughtered every ninja in the village, and left Satoru and Nanbu fighting this incredibly strong opponent on their own. The blue-haired young man annihlated Nanbu and impaled Satoru with his own katana. The young man who had aided Vega with this genocide was.....Ryokay.