the wizard, as hinted in the latest chapter lost faith in finding other demons like him. so, he decided to make it his lifelong goal to create a demon to be his companion. in a plot favorable to the mandragora witch, and Ritter who has genuinely fallen in love with the purple mandragora, decides to support their love on the theory that they may reproduce to create a demon. in the novel he is so down bad that he always fawn over her, buys her accessories and a custom dress, and even has bedding for her at the knights headquarters