King Oak is the wise and beloved ruler of the Oak Kingdom. He adores his daughter Cornelia, and can hardly believe she has grown so quickly. For many years, the King had arranged Cornelia to marry the Flower Prince not just for the good of the kingdom, but because he knows they would form a strong and trusting couple. The King is as gentle as he is stern and unshakable. He is only ever vulnerable around his daughter, and tries desperately to protect her and prepare her for the future. He speaks with a deep and commanding voice and is able to shift quickly between acting jolly and acting forceful.