Wakaba Tsukishima

Wakaba Tsukishima is the second daughter of the Tsukishima family and is in fifth grade during Part One. She and Kou are almost constantly together throughout childhood, and Wakaba openly imagines a shared future, even giving him a schedule of birthday gifts that includes an engagement ring for her 20th birthday. She also repeatedly gives Kou alarm clocks because he struggles to wake up in the morning.