Seppun Dozan was a noble of Otosan Uchi who had a daughter, Seppun Aya. In 1128 the Shadowlands Horde invaded the Imperial City while she was away, and Dozan was killed in his home during the fight. Aya managed to sneak into Otosan Uchi, and arrived to the family house. Aya did not care her father was already dead, and headed directly to the family hidden treasure.