Shiori the Monster Cat/Origin

Origin
The bakeneko (化け猫, "changed cat") is a type of Japanese yōkai, or supernatural creature. According to its name, it is a cat that has changed into a yōkai. It is often confused with the nekomata, another cat-like yōkai, and the distinction between the two can often be quite ambiguous.

There are legends of bakeneko in various parts of Japan, but the tale of the Nabeshima Bakeneko Disturbance in Saga Prefecture is especially famous.