Sky King II: Reborn

After the Hellot Islands invade and conquer the Syncaire Kingdom, previous military officers and politicians enter hiding among civilians to avoid execution. While in hiding, an old general is discovered by the daughter of a previous pilot, asking him to teach her the ways of combat to eventually fight back against the Hellot invaders.

Reluctantly and hesitantly, he agrees to train her, attempting to find other young people who hope to fight back against the Hellot Prince and his army.