Not only that ....
Their two children fought together and showed their abilities.
Kazuki wasn't confident at first, he had thought that he would be useless for resistance and he couldn't fight the enemy on the battlefield surely everyone there was very strong. He also didn't want to disappear just for donating his powerlessness to the enemy.
With self-confidence and the kitchen knife he was holding and even with the encouragement of his brother, Kazuki became able. He was able to injure monsters and cut them like chopping meat in the kitchen. It turns out that cooking skills can also be used for war.
He became self-confident and convinced that he could do it, just not trying too hard to do it. What had made him pessimistic while he had a pretty great ability?
Seeing the success of his sister, the older brother smiled happily, then who else is not happy that his favorite sister has managed to develop so well?