Nanako Watanabe

Nanako Watanabe (渡辺 奈々子 Watanabe Nanako) is a character from the original oneshot who dated Ichirō Yamanaka in middle school.

Backstory
Nanako and Namiko Watanabe (Nanako's twin sister) were childhood friends with Ichirō Yamanaka, and she comforted him when his dog died while they were young.

Prior to graduating, she was killed in an automobile accident.

Etymology

 * The name Nanako means "Nara, what" (奈) (na) and "child" (子) (ko).
 * Nanako's surname Watanabe means "cross, ferry" (渡) (wata) and "edge, side" (辺) (be).