She looks young, most girls don't embrace their craziness until they're in their late teens, early twenties.
At least the ones I know, myself included. If she's only into monster makeup, don't sweat it.
But if you find out she's into the darker shit (goth, emo, etc. yes, I'm being stereotypic), ask yourself if your prepared to deal with some issues in the psychological field.
wish you both the best, she is a cutie.
Katawa Shoujo helped him a bit in the psychological field.