A Brief Taxonomy of Demons Familiar with different types of demons? This post will teach you the defining characteristics of several classes. This is a brief taxonomy of demons. The categories explained below cover the fundamental demon types. Naturally, there are numerous sub-categories in addition to these; but for the purposes of this post, exploring the sub-categories is not necessary. While the roles of many demons fall neatly into one category, it is important to note that many exhibit behaviour typical of other classes as well. For example, a single demon might be a stalker, deceiverandpossessor depending on the circumstances.