Nanakawa Tadashi
七河 正志
| Nanakawa Tadashi七河 正志B | |
| Measurements | Height: 180cm |
| Birthday | 2 February |
| Hair | Brown |
| Eyes | Blue |
| Clothes | Necklace, Necktie, School Uniform, Suit |
| Role | Classmate, Friend, Full Brother, Tsukkomi, Twin Brother, Younger Brother |
| Engages in | Sports |
| Visual novels | Side character - Tokimeki Memorial 4 |
| Voiced by | Nakamura Yuuichi |
DescriptionOne of the trio (with Hoshikawa Maki and Kobayashi Manabu) who always in the same class with the protagonist. He is genius at sports and have many fangirls. He has a twin sister named Nanakawa Rui. | |