Shinku is at first quite a queen-like character, and seemed to love nothing more than consistently abusing her medium, Jun Sakarada, be it by slapping (sometimes with her ponytails), kicking, or hitting him when he didn't comply with her orders, as she treated him as her servant. Her main goal in life was to win the Alice Game and become Alice. Her motto was originally, "To live is to fight." Over time, with Jun's guidance, she abandoned this idea and only fought to protect others.
She is also portrayed to be a bit childish in the anime. Whenever watching her favorite television program, "Detective Kun-Kun", she is often shown to believe the episode's happenings to be true. For example, when a villain was sneaking up behind Kun-Kun in one episode, Shinku screams for him to get out of the way. She also seems to be a hardcore fan, once even sending away for a detective kit given away in a contest. As shown in Ouvertüre, Shinku has a fear of cats due to one of her previous medium's pet feline, which came terribly close to swallowing her wind-up key.