I always thought that Anette was like her cousin or something since they have the same physical appearance. Like her dad got an affair with an elf and left the country to persue his lover, and Anette was born from it. Which explains her short stature
Anette's Acorn necklace is an elven ornament too which is the cause of the monsters constantly attracted to her. The only explanation we got from the necklace is that her father gave it to her.