He is a fairly cold person a lot of the time, especialy to people he does not know, but the few friends that he keeps he would give his life to protect. in most situations he is a very rational and colected thinker but in high stress situations he often looses his cool and will act very irrationally and in haste.
His fathers battle axe, it has a square steal pole and branches off into 2 blades one wide and one narrow.
Kuni knives and Shurikin
When he was growing up Masao and his brother Kadaj were under the tutorship of their father Naota. A few months after Masao's older brother turned 18 he was suposed to take the title as clan leader, instead he went AWOL leaving Masao as next in line. 3 months proceeding Kadaj's disappearance a zombie like figure appeared in Masao's section of the hidden cloud village commanding a skeleton army and killing the majority of his clan. Masao is now training to kill his brother and find out why he turned out the way he did.