Natsuki has neck-length dark hair that has bangs hanging on the right side and dark brown eyes.
Natsuki is a high-spirited and friendly girl, but she takes her softball seriously.
She is close friends with Yuu who often looked out for her when they were on the team together. Although she considered asking Yuu to apply to the same school so that they could continue playing together, she decided not to because she didn't want to unduly influence Yuu's choice.
After middle school, Natsuki applied specifically to a high school with a softball club so she could continue playing. Natsuki ended up going to a different high school than Yuu, Akari and Koyomi, and thus rarely sees them since she is so busy with her club activities, although they still meet up occasionally.
- The name Natsuki means "vegetables, greens" (菜) (na) and "moon" (月) (tsuki).
- Natsuki's surname Sonomura means "garden" (園) (sono) and "town, village" (村) (mura).
- Natsuki has a pet Shiba Inu.
|Yuu Koito • Touko Nanami • Sayaka Saeki • Akari Hyuuga • Koyomi Kanou • Seiji Maki • Suguru Doujima • Natsuki Sonomura • Manaka Yoshida • Midori Igarashi • Chie Yuzuki • Serizawa • Oogaki|