Hidden Schemes Behind The Scenes

"Alex is still too young to marry," Yue said with a frown. "How can he declare that he is going to marry after winning the tournament?"

Belle looked at his agitated Master with a wry smile. Naturally, she knew who Alex was referring to. As a summoned hero, their affection was aimed towards their Master. 

Yue paced back and forth inside the room that was provided to them within the flying castle. Her plan was to get close to Alex while he was still young, so that the boy would have a good impression of her when he grew up.

Since she was an Earthling, there were certain rules that were ingrained in her and among them was being of legal age to marry. 

When she first saw Alex, he was only eight-years-old. The next time she saw him, the boy was already twelve! Since Alex declared that he would become eighteen years old after he won the tournament then Yue had no choice but to believe it.