... I might be speaking up way too late, and I hope this doesn't seem presumptuous, but it seems to me that the most reasonable system to use is human/person/entity:
Human: The one is to all visual indications a human being, the kind that might exist in our world.
Person: The one in question is not a human being, but everyone interacts with them as if they were a human being, just one with a different shape and nature.
Entity: The one in question isn't human or treated as one.
Humanification: A person who isn't a human being is represented as one, or more like one than they canonically are.
Personification: An entity that isn't a person is represented as one.
So, to back that up with some examples:
Lilith Aensland from Darkstalkers is not a human being. She is a succubus; she has bat-like wings coming from her head and her back. If you draw a version of her where the bat wings coming from her head are actually just hair, and those coming from her back are actually part of her clothing, that's humanification.
Sharuru, or Luna (Sailor Moon) or Artemis (Sailor Moon), are not human beings. They are a rabbit and cats, respectively; however, they all think and talk and act like human beings who just happen to have non-human bodies. If you draw versions of them where they are human beings*, it's humanification. That applies even if they are drawn with non-human ears coming off their humanoid bodies, or with tails coming off their humanoid rears; they're still being depicted as closer to human than they usually are.
Pikachu and the other Pokemon from Pokemon are neither human beings nor people. They're depicted as having some ability to reason and communicate (with other Pokemon) on a level comparable to humans, but they're not on the level of people. If you draw versions of Pokemon as human or humanoid, it's personification; even if they're depicted in the drawing as 100% human, the big difference between that and their canon depiction is from "not a person" to "person".
- To be honest, I'm really not sure whether either humanification or personification is really the right term to use, for characters who have canonical human secondary forms. Wouldn't we just have a secondary character tag, e.g. Luna and Luna (human form)?