SHlGEKO'S DOSSIER: Naishi is the younger sister of Genshi (P19) and in many ways acts as if she was the older. She is respectful, thoughtful, honest and possesses a calm demeanor her rash sister sorely lacks. It was she who explained to me the root of Genshi's anger; as with many stories of anger, it comes from shame.
Some years ago, their cousin Otaku Isas challenged Bayushi Tomaru to a duel. When the appointed day came, Isas asked for a delay, claiming illness. Then, on the date of the delay, he vanished altogether. It is widely believed that he fled the country rather than face Tomaru.
Genshi believes that Tomaru somehow poisoned Isas before each duel, but I find it more likely that she is simply denying her cousin's cowardice.
After being challenged to a duel by Bayushi Saigo, the magistrates faked her death in front of the assembled crowd. She was given a drug that would make her appear to be dead and faked a heart attack, being pronounced dead at the scene. They later retrieved her before she could be cremated and helped her escape from the city. Her current whereabouts are unknown.