Kai

At the start of the series he is one of 4 surviving members of the original dragon army. Wielding the dragon fang Azura (the seventh sword), And having the wooden dolls as advisors.

After Valins Incarnation he fought against Indiral, who was known as the best fighter among the dragon army, and won despite not having the power of the essence of the Nye.

After Azura went from his hands to Simon, his student, he earned Mythra, Valins sword, Making the Eldest of the Nye his advisor.