So why do her paintings look so . . . unrealistic?
Two reasons. The first is practical: As a vampire, she can't see herself in a mirror and so using herself as a reference is impossible. The second though is something that artists have wrestled with for decades - Draculaura decided to paint how she feels, not how she looks. That sounds like a lot of artists who paint unrealistically and make some of the most interesting paintings in the world.
Pablo Picasso was one such artist. In some of his paintings of people you can see pieces of faces that don't seem to be in the right place. This is on purpose. What he was doing was painting people from different angles, but combining those angles into one painting. In his portraits, you can see the side view of someone and their face from the front. Showing things from more than one viewpoint is part of a kind of art called Cubist (like cutest, but with a B!).
When you look at his portraits of people, they sometimes look as if they are moving - like they might just turn and look at you. This helps to show how they are feeling inside.
Picasso and other artists who painted this way also used bright colors to show emotions instead of just matching people's skin colors. Artists used the colors that they felt were right, instead of what their eyes told them. This kind of art is called Fauvist (Fauv rhymes with stove or drove or clove).