Libidine was a lower rank demon who fell for Beezlebub and his quest for control. Devoting herself to him, he gave her an artifact to increase her power and collect souls for him, making her his "Princess of Hell: Lust."

While Libidine, aka Libby, isn't the smartest of the group, she's effecient in her trade. She has a bubbly personality that can be unnerving when coupled with her desire to destroy the world for Beezlebub. She has a habit of throwing hissy fits when upset, but easily forgets what made her upset prior. Its very "head empty no thoughts" for this demon, who in the end, simply wants to pursue love and falling in love. Seeing couples or people even remotely interested in each other causes her to get giddy and she 'lends them a hand.'