Peryite is considered to be one of the more evil daedric princes, amongst Vaermina and Mehrunes Dagon, but he doesn't seem evil to me. His purpose is to maintain a natural order using plagues, Molag Bal, Boethiah, Mephala,... are just about evil things like slavery, plots, betraying,... Peryite seems to be only a more unorthodox Kynareth.
Ashley Kirshbaum wrote: saying a daedra is good or evil is a gross oversimplification of the facts. daedra (and divines, for that matter) don't care about morality and related matters, they just carry out their sphere.
You can, however, see if their spheres have negative impacts on mortals. Based on that, you can CLEARLY say that Dagon and Molag Bal are evil, since they seek/cause destruction, subjugation and slavery of mortals.
Azura, on the other hand, cares about the balance between Dusk and Dawn, or Evil and Good. Clearly, equilibrium is a good thing since it helps maintaining the world in order, which is why she is often considered neutral or good.
Ashley Kirshbaum wrote:
saying a daedra is good or evil is a gross oversimplification of the facts. daedra (and divines, for that matter) don't care about morality and related matters, they just carry out their sphere.
Well, it's not really about how the daedric prince thinks about its actions, because they as you say just follow their plane or "purpose" but the post was based on a book within the elder scrolls games that talks about how Peryite would be evil, that is a perception from a mortal writing about the daedric prince. So the post is about how people who can judge Peryite's actions with a sense of morality see his actions, and that the mortals in TES shouldn't see Peryite as evil but more as a nature god that looks after the order in nature.