Karane is a tsundere girl.She is known for being straightforward and honest about how she feels about a given situation except for two subjects: her feminine figure (or supposed lack of) and her deep love for Rentarou Aijou. Her desperate attempts to hide how she feels about a given situation despite her honest nature often make people think she is going to beat them. Karane is also a closet pervert, it is seen when she sniffs Rentarou's coat which he left on the chair to wash his hands.[4] Before chapter 50, Karane possibly hated the fact that she was tsundere and wanted to express her feelings to Rentarou. Karane’s tsundere is determined by the "tsundere factor", without it she is able to express her feeling clearly. Different from her verbal performance, when other members of the Rentarou Family are in danger, Karane often provides protection and help to her friends, as reliable as a big sister. Her small bust is a frequently a source of insecurity for her such as when she wore a poncho over her swimsuit during the group date at the waterpark. Regardless. she is quoted to be beautiful with desirable features and is occasionally hit on by other guys, much to her annoyance and Rentarou's jealousy "I-It's not like I twisted my ankle just for a chance to lean on your shoulder or anything, okay?"Karane's family history is unknown at this point, although they are all tsunderes like her. She is met by Rentarou when he bumped into her and Hakari Hanazono on their first day of high school. The two fall in love with him at first sight and confessed their feelings to him. Rentarou saw this as problematic as both are two of his supposed destined 100 girlfriends and if he chooses only one of them then the rest will all die. So Rentarou decided to date both of them at the same time and despite some reservations about it, Karane and Hakari agreed to it.When Karane and Ahko went shopping together, they met Ahko's friends. Karane angrily criticized them for not caring about Ahko's feelings and declared that she would be Ahko's forever friend. Ahko expressed her gratitude to Karane.