ユナン

The protagonist's cousin and the king's servant.
In his route, he saves and travels with Ashe to the human world.
You can unlock him unlocking all of Leni's and Seizh's content
He is the real son of the maou, but he changed Unan for Ashe, who is the maou's niece, because she was more powerful than him. He was raised as a servant of the castle.
He knows everything about this, and that is why he tells that to Ashe in his route.