Hamano Tatami appears in both the television series and the film adaptation. She is a 12-year-old girl born on August 30 with blood type A. Standing 148 cm tall and weighing 36 kg, Tatami wears glasses. She attends Sakuragai Elementary School as a sixth-grade student, where her best friend is Nishikiori Ayako. Tatami lists the fox as her favorite animal and identifies bell pepper as her least preferred food.