A determined schoolgirl who "possesses a remarkable hearing ability." She believes that by persevering in karuta, she will meet Arata again, and begins a karuta club at her high school with Mashima. While she is beautiful, she is considered too weird; her classmates refer to her as a "waste of a beauty." She has been described as a "tomboy trapped in a supermodel's body." Even when the gods Held sway in the ancient days, I have never heard That water gleamed with autumn red As it does in Tatsuta's stream (Source: Wikipedia)

Atsushi Ootani is one of the main characters. He is very short for a boy, standing 156 centimetres (5 ft 1 in). The average height for a male in Japan is 171 cm (5 ft 7 in). Like Koizumi, Ootani's surname (roughly, "big valley") is a pun on his diminutive stature, and he can be thoughtless and rude; at heart, however, he is kind and a little silly. Ootani is also the star player of the school basketball team. Some say he wears padded shoes so he can reach 162 cm (5'3"). (Source: Wikipedia)