"Seia Pavillion" is not in the list of possible values (Nura Clan, Kyōto Yōkai Clan, Hyaku Monogatari Clan, Bakeneko Clan, Bakenekoya, Centipede Tribe, Club ChuChu, Daruma Alliance, First District, Gagoze Alliance, Gyūki Clan, Gyūki Mansion, Hideshima Domain, Hideshima Shrine, Hiyoshi Gongen shrine, Kantō Great Ape Alliance, Keikain House, Keikain Main House, Kijo Clan, Kiyotsugu's Family Villa, Kusaka Shrine, Kyōto, Kyōto Yōkai, Kyūso Clan, Mount Hiei, Mount Kurama, Mount Nejireme, Mount Takao Tengu Party, Mt. Osore, Mukurowaguruma Gang, Nijō Castle, Nishihōgan-ji, Noppera Group, Nuega-Ike, Nura House, Obake Clan, One-Eyed Cedar, One-Eyed Demon Clan, Rokukin-ji, Sanba Garasu, Seiei-ji, Shikoku, Shikoku Hachijūhakki Yakō, Shimabara, Sōkoku-ji, Three-Eyed Party, Togyunobo, Tsurara Clan, Tōfu Kozō, Tōno Village, Ukiyoe General Hospital, Ukiyoe Middle School, Ukiyoe Town, Umewakamaru's Shrine, Ushigakure Cave, XX Village, Yakushi Clan, Yamanba Group, Yōhime's Family's Mansion, Yōkai Merchant Confederation, Ōsaka Castle, Ōshū Tōno Family) for this property.
The Hyaku Monogatari Clan (百物語組; Literally meaning "Hundred Stories Clan") is a yōkai group whose main source of fear is not through direct haunting (Kyoto Yōkai) or Land Gods (Nura Clan), but through "collecting", "telling", and "creating" haunting tales about the supernatural, which helps generate and propagate fear among humans. The Nishikigoi District was once under their control.
It and the Nura Clan were the two clan associations for yōkai and other supernatural beings in Edo. During that era, they greatly increased their influence through creating tales. The clan began as a means for the then-human Sanmoto Gorōzaemon to obtain power and "fear". Through the tradition of the "hundred stories" and the Hyakki Teakettle, he used fear to gather and control both yōkai and humans alike. The creatures created as a result of the hundred stories were made into his underlings, but they were all relatively weak compared to standard yōkai.
The group was frequently at odds with the Nura Clan under Rihan's leadership, and were eventually crushed by the Nura Clan's forces approximately a hundred years ago. The clan as it exists in the present came about when a desperate Sanmoto used himself as a catalyst for the hundredth tale. As a result, his body split into 100 parts which each became a separate yōkai. Currently, the clan is encroaching on the Nura Clan's territory and working to revive Sanmoto's main body, which resides in hell.