Sometimes happen that Kise's teeth change their form.
This mutation cause a massive grown of canines and this can appear on upper canines, lower canines or both, making them visible also when the mouth is closed.
These teeth gives to the Kise extra benefits in battle, that means they gain +1 ATK.
Vampire teeth
Tusk teeth
Even if the mutation is called Fangs, in the breeding results they will always rolled in a separated way and have their names: Vampire and Tusk.
Sometimes they could appear together! When it happens, the stats will become +2 ATK instead of +1 ATK.