"Mythicals" is the term used for supernatural beings who are not fully human but have human intelligence and are socially compatible with humanity.
A supernatural cryptid that's only as smart as a goldfish is not a mythical because they don't have human intelligence. Similarly, something like a Lovecraftian outer god wouldn't be a mythical, because their intelligence is still not very human-like.
Some mythicals, in truth, originate from humans that were given supernatural characteristics. P's species, for example, fits that bill. They were regular humans who became what they are because of a goddess. Others, like Khenbish, descend from animals that were given a more human intelligence and shape. And others, like Themba, were created like that from the very start, with human intelligence and all. Some mythicals are like Kota, in the sense that they are minor nature spirits. And so on.
Being deemed a "mythical" has a specific societal meaning. Though very few regular humans are aware mythicals even exist in the first place, being deemed a mythical carries the very important implication that you can enjoy, well, human rights. You can vote, go to school, have a job, all that stuff. You are more or less welcomed into human society.
Some supernatural beings with human intelligence, however, are not technically given the status of "mythical" because their existence might be incompatible with humanity. You could fit some malevolent entities here, assuming they truly are dangerous and it's not just lies spread about them. If this happens to you, it basically means you don't have rights. You're no more than an animal in the eyes of society. Which might be just perfect if a supernatural entity just wants to live in the woods unbothered by grubby humans, but it can end in many other ways too.