Kana is the middle sister in her second year of junior-high school. Kana is an impulsive and lively girl who never thinks before acting. She is a horrible cook, a chronic oversleeper, and is obsessed with Chiaki treating her as an adorable older sister rather than as a foil. She often acts or talks impolitely without thinking, much to the annoyance of Chiaki. She has been misled by Chiaki into thinking that Fujioka has a grudge against her rather than a crush. She generally does not get good grades in school, though she thinks that if she puts on Keiko's glasses she will act and speak intelligently. She frequently invents random new holidays and also recruits Chiaki's classmates into joining her silly escapades. "Kana" contains the kanji for "summer".