Hiroku was born into his father's shadow to become a great ANBU Captain. When he was 7 he reached Chunin level, but it still wasn't respected by his father. His sister May had taught him never to give up on being a ninja. By the time he was 14 he surpassed his father and was able to beat him in battle. His father was impressed, and showed off his son's power in very evil ways. He had threatened to kill Genin if his son couldn't become an ANBU Captain, but Hazai didn't agree to use his power for his father's greed and his