Towiki was a kitchen worker at the Ito family's castle. She fell in love with Ajimo Heikaru, the first son of the family's warlord. However, distracted by his love, Heikaru was negligent in rallying the clan's army when needed in 647 DR. So a curse transformed him into a wererat condemned to guard his lover's room for eternity, while she was turned into a butterfly.
At last, in 1360 DR, an adventuring party hired by Michimori Uemon to recover the Seven Swords fought and destroyed Heikaru. Afterward, Towiki met them, telling them information about the swords and later disappeared.