The reason Count Stelter is worried is mainly because he is indeed a decent man... only having legitimate children.
His eldest son, Ditte, is very much like him, and at a young age, already became an official battle professional... as long as the aptitude is there and there's hard work, nobles always have various assistance methods to promote their children, it's just a matter of willingness.
The second son, Lind... he feels most sorry for this youngest son. Despite having mage aptitude, he can only let him take the path of a magical swordsman.
But Count Stelter couldn't do much, even his daughter wanted to become an official mage and the Stelter Family exhausted all its connections... and even then it wasn't a proper mage institution, just paid heavily to invite a Level 6 mage to teach for three years.
If not for Alitorman being smart and resourceful enough to dig out plenty of knowledge in three years, how could he have become an official mage at just 16?
