Diavolo is the ruler of all demons, and all who reside in the Devildom know of his name, she is a famous singer in a Devildom tearoom, her voice has a strong charm and many people fall in love with her. spend a lot of money going to the tea room just to hear her sing.

He happened to know her when he sneaked out of Barbatos to play, and passed by the tea room where she worked, then he fell in love with her voice and became a regular customer.