Always compared to her younger sister Marietta, who was known to be a matchless beauty; the "Dull Princess" Selen, the duke's daughter was brought up with ridicule. Hearing her fiancé saying "I want to make Marietta the Queen", she decided to break the engagement by herself.

With the black cat familiar she borrowed from the "Leader of the Ice Mages", Viol, she aims for an amicable engagement annulment.