Kaori, also known as Kaorin, is a girl infatuated with Sakaki, whose unrequited feelings are a frequent source of anxiety. Her friends seem mostly unaware of her crush on Sakaki, and it is unknown whether or not Sakaki would reciprocate. Even if Sakaki knows of Kaorin's affections for her, she never shows any sign of seeing her as anything other than a friend. While her given name is Kaori, she is almost always addressed by her nickname of Kaorin.  Kaorin is normally shy and sensitive to a fault, but frequently has been known to display a ferocious temper and is prone to extreme jealousy when Sakaki is involved. She can also be more than a little neurotic.