She is Mai Natsume's eccentric roommate at the Military Academy. Cajun has a princess-like attitude and an extreme thirst of knowledge. She tries to learn as much as possible, and has developed a habit of collecting information on anything new. The urge to know sometimes drives her into doing odd things, or making others do odd things for her; she even carries a small handbook around to write down everything she ever recorded. This fact does not mean that she is insensitive towards others' feelings, however. Despite having an odd habit, she is actually good-natured at heart, willingly ate Noel's death cooking with Mai and created a chance for Tsubaki to be together with Jin, being aware of her feelings. After the festival was over, Cajun began to take some hidden interest in Mai, albeit with a dark expression, for attracting grimoires.