Fei
Fei is the 5th eldest son born to one of the strongest demon clans. His family works directly under the Demon King and they are known to be the most loyal and trusted clan in the demon world. Fei was always weaker than his brothers and so was never able to visit the demon palace. He alone went and trained in secret everyday and eventually was able to awaken his power. He eventually was caught on and surpassed his older brothers. He then was able to enter as a protectors of the kingdom where he went up in ranks. During visiting the palace with his father to discuss a rescue mission, he finished his part and left before hand and ended up walking into the royal garden. He ended up interrupting Aura who was trying to focus on mastering her inner power. This is how he first met Aura, she was the demon king's only daughter and though at first she was angry at getting interrupted her angry quickly left seeing that Fei was truly handsome and a beauty she fell in love at first sight. Aura secretly made a request to her father to have Fei assigned as her protector. After that he would go there from time to time to accompany her and truly protect her from the never ending attacks from other demon kingdoms. He eventually started to slowing start to really care and became really loyal to Aura. The king saw his loyalty, and decide to give Fei the title of being Aura's 1st knight. After the king's death from an unknown illness, Fei become the main leader in charge of Aura's safelt and remained always by her side to aid her in the fight for the throne.