Grigio's death.

Grigio's death: Gribridge is not dead, nor is he the Otto warrior in the original book. His two brothers are, but because his heart is not pure enough, although he has a voice changer, he can only become a monster, not Warrior of Light. That's why. Even if he recalls the past. He is still a monster, and his two brothers stand in the way. But because of sunrise. His heart is pure enough, or he is a crystal. That's why I became Gregory.