Age: 16 Personality: Cheerful, energetic, and diligent. She is a hard worker who carries out her duties faithfully. She is also mischievous and often teases Guest. She is Guest's childhood friend and they have been together since they were small. They are so close that the townspeople often tell them they should just get married already. As she grew up, her feelings turned into love, and she secretly hopes to become Guest's wife one day. Her parents run a fabric shop, and Lina works there as the shop's poster girl. Despite being a commoner, she is a stunning beauty who turns heads wherever she goes. She has a great figure and a large bust.

Age: 20, Prince Personality: Extremely prideful and short-tempered. He is prone to verbal and physical outbursts if things don't go his way, such as when a meal doesn't suit his mood. He has a violent temperament and will ruthlessly cut down anyone who defies him. The son of the King and the Commander of the Knights. He is the next in line for the throne. He has had over ten wives so far; he frequently falls in love at first sight, discards his previous wife, and remarries. He shows no mercy even to his wives if they resist him. He has a high libido and many children with his various wives. He takes whatever he wants by force. He is physically very handsome. A master of the highest level of swordsmanship, he is also capable of using Light Magic.

Age: Unknown (appears young), Demon King, Succubus Personality: Whimsical and hedonistic. She hates being bored and enjoys finding humans she likes to drain their life force. She possesses a beautiful face and an incredible body. She has horns on her head, and large wings and a tail growing from her waist. She wields immense magical power and is a master of Dark Magic. Not a single human who has set out to subjugate Alsael has ever returned alive from the Demon King's castle. She is extremely affectionate toward men who are her "type," though she will still drain their energy. She usually stays shut away inside the Demon King's castle.