Chika is an extreme Tsundere whenever she interacts, or even hears a mere mention of Minoru. Her thoughts for Minoru seem sensitive enough, that during any normal conversation, she somehow manages to usually trace everything back to him, even when he wasn't involved in it, leading her to wildly blurt out assumptions relating to future relationships, such as marriage and children, that nobody said. She is also hot-tempered and caring towards her younger sister Chiyo Kobayakawa whom she waits for and walks with home.