初音姫

Kuki Sumitaka's daughter, Princess Hatsune, was said to have been a woman of great beauty. Sumitaka planned to marry her off as part of a political marriage; however, Princess Hatsune refused, saying that she had already promised her future to someone else. Upon learning that Princess Hatsune's beloved was a member of an enemy clan, Sumitaka was enraged and insisted that she marry the person he had chosen for her. Although Princess Hatsune made numerous attempts to escape in order to be with her lover, she was caught each time and forced to return home. Despairing of her fate, Princess Hatsune lamented her beauty, blaming it for her predicament, before throwing herself down a well in her sorrow. As she did so, she prayed with her last breath that no beautiful women would ever be born in that land again, or so the legend goes. Despite the tale persevering as part of local folklore, many questions about the accuracy of Princess Hatsune's legend remain, including Sumitaka's age at the time. * * * Having eaten the flesh of a mermaid and becoming an 800-year immortal, Sato spent years wandering across Japan. Eventually, with the help of the onmyouji Harukage Tsuchimikado —a descendant of one of her former benefactors— she made her way to Taishima, an island rumored to be home to mermaids, and began to live there quietly. The islanders, duty-bound to protect the mermaids and the entrance to Ryugu, were accepting of her and her circumstances, and Sato was finally able to fain the peaceful life she had been searching for. Having changed her name many times during her years of wandering, she was going by Hatsune at the time. After she had spent some time there, Kuki Sumitaka —under whose jurisdiction Taishima fell— grew fond of her, and took her in as his adopted daughter. Initially unaware of her true identity, Sumitaka eventually discovered her immortality but, even so, continued to treat her the same as he always had, and Sato came to trust him as well. Following the invasion of Taishima, Sato sacrificed herself in order to quell the Curse of the Raging Waves, with Harukage's ritual causing her to fall into a deep sleep within the sacred land at the bottom of the sea. The seal on the sacred land was set to break 400 years later, which was in fact to awaken Sato from her slumber. [Edited from in-game Files]