Dragon Genes

(Miko calls it "Dragon Genes")

Miko has Dragon Genes in her DNA which allows her to do things a Dragon can. (She can transform into one) Dragon Genes also gives Miko bones as hard as diamonds.

Dragon Curse Mark
The Dragon Curse mark is what causes Miko to go Berserk. Or cause her senses to go crazy and revert to their Dragon Ways.

The Dragon Curse Mark was featured when Miko obtained her Energia.