This infographic gives brief summaries of the 12 Jungian personality archetypes, for use when building charcaters. As with any writing tools, archetypes are really most useful if you think of them as a starying block - you cannot simply reduce people to 12 options. Most people will show traits from multiple categories. As a writer, you may want to think about each character's primary and secondary archetypes. As always, remember: Tools, not rules!
Oh my gosh thank you! I think this helped me just put the cherry on top of my villain, and helped me with trying to give my hero motivation. http://www.weightlossjumpstars.com/self-motivational-weight-loss-books/
Shape shifters One form of limitations could be that the shapeshifter needs an animal pelt, such as the selkie skin, or forms of the werecreature myths. In some werecreature myths, the person could only shift with the removal of clothes, and only become human again by putting on their clothes again.