Yōkai

Yōkai are a genus of spirits containing over 60 different species, making it perhaps the most diverse genus of not only spirits, but all parafaeia. Yōkai inhabit a vast variety of climates throughout various corners of western Eisea, including its forests, swamps, sees, and mountains; they are especially prominent on the plethora of islands of the Jiponish Empire.

Trivia

 * Unlike most other spirits, yōkai are not only actively observed and noticed, but also tend to prefer making themselves known. This possibly makes them the least elusive of spirits, though it depends on the species.