Not much is known about Ahiro's past, although it was established that he had a younger sister and his father was "a high powered man" who was a drug trafficker. He was killed during a government raid by Yoriku, who couldn't bring himself to kill a ten year old Ahiro and his sister. Deriding from his father's traditionalist values, Ahiro sworn lifelong loyalty to Yoriku and began working for him. He had never seen his sister since, though he did talk to her occasionally. As for his mother, he never saw her either afterwards, assuming that she was dead. Brought to America soon after his father's death, Yoriku made sure that Ahiro was privately tutored to become a ninja, serving every need of the CEO, legal or illegal.