Approximately ten years prior to the start of Dark Dawn, Hinechou's home country of Sana conquered the neighboring country of Morgal. Hinechou's husband, Lord Kuan was assigned to be the Governor of the new colony. At Kuan's request, Hinechou came to Morgal's capital of Belinsk with Hou Ju and Ryu Kou. At some point, Kuan's brother Unan became Emperor of Sana following a civil war, which had the effect of making Lady Hinechou part of Sana's royal family. Soon afterward, Lady Hinechou returned to Sana for a chance visit. While she was gone, the native Beastmen of Morgal began a revolution to overthrow the Sanan government. Lord Kuan was killed in the battle, while Ryu Kou and Hou Ju were forced to flee to Te Rya Village. At this point, Lady Hinechou became despondent, as she believed that she was the only survivor of her family.
Unknown to Hinechou, Hou Ju is captured and held prisoner within Belinsk causing Ryu Kou and Hou Zan go out to try to save her. When Unan hears word that the two children are Morgal, he sends a ship to rescue them. When the ship never returns, Hinechou falls deeper into despair. She is so worried that even though she has a way to determine whether Hou Ju is alive - she and Hou Ju have two matching gems called Echo Gems, which glow while both of their possessors are alive - she is too afraid to check it, and keeps it guarded within a drawer.
When Matthew's party of Adepts are on their own search for Ryu Kou and Hou Ju, they secretly take Hinechou's Echo Gem for themselves so that they can determine where in Weyard the two currently are. Later, Matthew successfully brings Hinechou's children back home. As a reward, Hinechou gives Matthew the Lady Moon's Ring, and offers to pray for Matthew's safe return.
- In Tonfon:
- Hinechou: "The others tell me I must accept that Ryu Kou and Hou Ju are dead. This I cannot do. If only my husband had not been slain... His Echo Gem would have found Hou Ju easily."
- Hinechou: (Thinking) "The Echo Gems have served our family for generations. I thought Hou Ju would be safe with hers. Each gem will always find the other... unless you cannot bring yourself to remove yours from your dresser...
- Hinechou: (After Ryu Kou and Hou Ju are returned) "...You're back. I'm so, so glad..."
- Hinechou: "Matthew, you and your friends have returned by children to me. I can never truly repay this kindness."
- Hinechou: "If I spent the next hundred years thanking you for saving my children, it would still seem insufficient."
- Hinechou: "We will always live in debt to you, and I will pray for your safe return just as I prayed for my children's."