Natsu-iro Kiseki: Natsumi Aizawa

Natsumi is a second year middle school student in the tennis club. She's a bright, energetic, and honest girl. Since she was raised by a single mother, she's used to helping out with household chores, and takes good care of her younger brother, Daiki. She lives next to Saki, and they've been friends since they were young, so they're a pair in the tennis club.