Blue learned to not be so prideful. Unfortunately he learned this to late and died because of it.
Blue is born the first child of King Percy and queen Annabeth
Years later the brave and loyal prince is finally old enough to go on his quest to become King. To become king, he must slay a monster. He picked the biggest monster against the warnings from his sister Athena.
The monster is as tall as the castle itself which is bad for the prince for he is afraid of heights. The monster has been terrorizing a village in the kingdom, so that is where Blue must head.
The king has all the best magical creatures help out Blue by granting him magical weapons powerful enough to slay the beast if used correctly. He has to say goodbye to his pet dragon Festus, his sister, and his parents.
Blue finds the monster and challenges him. He fights valiantly getting closer to slaying the monster than anyone before him, but the monster picks him up. Blue freezes and the monster takes that opportunity to end the battle the monster throws him to the ground where he laid unmoving but barely breathing. The monster walks away.
The magical creatures found Blue and brought him back and treated his wounds best they could, but it was too late he managed to say goodbye to his family and admit to them he was wrong for thinking he could do this by himself. He died of his wounds shortly. His sister later became queen after finishing her quest. Her son whom she named Blue in remembrance of her brother went on to finish his quest and become King after his mother passed.