"They're Sorcerers of Exarial. Their kind of uniform identify them as Elite Mages, soldiers for the magic war. Even so, those kind of sorcerers are still learning in academy of magics, not all of them capable of casting destructive spells, there's still a lot of them aren't capable of casting attack spell at all."
Travellia and Kazy are sorcerers of Exarial from elite magic academy. Kazy is just a new person who joined as a part of elite mage. He can be a nut sometimes, and when they got to take job together, he will, at least once, would make Travellia's brain spins like a propeller.