With number 31's few interactions with Calter, he has a bit of understanding on the man. Especially on the system that Calter uses for his force, that system was the one that enable him to become a Rank 3 Mage
As the one that personally experienced it, and as a person who already saw how the world works, number 31 is sure that Calter will soon have higher authority and power. It only needed time
Calter has a brilliant mind and even the system he used to nourish his force is very effective. With how the youth's mind worked, Number 31 is sure that Calter would want a fire type Grand Knight mage to teach other mages
As of now, they focused on dark type mages. But with Blaze's son, they would soon be able to grow Rank 3 fire type mages too
With Number 31's assurance, Blaze's son immediately did as what he was told and took the oath on the spot
