The main protagonist of the story, Shizuoka is a timid girl with ombrophobia, a fear of rain to the extent that she can only bathe in a tub.
Her surname, Shizuoka, is the second most populous prefecture in the Chubu region, as all main characters have surnames derived from the region's prefectures. Her given name Kiyomi 清美 means "clean water".
She has a mousy appearance, with short, brown hair in a rounded style, circular glasses, and hazel eyes. She is 5'4" (162.6 cm) tall.
The main male protagonist, Aichi is a strange and energetic boy who holds a strong belief that rain signifies important change. Shizuoka knows very little about him, as they've only just met.
His surname Aichi is derived from Aichi Prefecture, the most populous in Chubu region. His given name Usui 雨水 means "rainwater".
He has bright blond hair that juts out in multiple directions as he doesn't take care of it, and he stands at 5'8" (173 cm) tall.