Bonnon is the genius loci spirit in Volume 13, Exam Battle #2. She is awakened when she senses the intensity of Ami Mizuno's passion for studying and beating her academic rival, Mercurius. Spying Ami from the rooftop of the prep school where Ami attends, she speculates that Ami must be in love because she is thinking only of Mercurius. On her way to school one day Ami passes out wakes up in the nurse's office. Bonnon appears and uses a love letter attack on Ami so that she will be guided by her passions. Ami imagines all of the information that she has learned and memorized leaving her brain. Bonnon introduces herself, but Ami believes that it is Mercurius trying desperately to defeat her. Bonnon argues that she is not Mercurius, but she cannot convince the delirious Ami, who transforms in