Need a monster not used for monster high?

Faun, centaur, siren, changeling, fairy, mermaid... or just make something up. It is Monster High... like whatever Frankie is it's made-up, just pulled off of another monster. Think of famous monster characters. Frankenstein, Dracula and Wolf-Man = Frankie, Draculaura and Clawdeen.

In case you didn't already know:

Faun = human with the legs/tail/horns/ears of a goat

Centaur = human with the body of a horse

Siren = woman with a very vain personality, they have the body of a fish (sort of like a mermaid) or various parts of a bird (bird wings instead of arms or something)

Changeling = basically a replacement of a child, switched at birth by fairies (you could probably make something up, like a changeling is often used in stories as an alien that can change it's appearance to look exactly like another person)