Sekai Arakawa

Ami's mother, whose loss she had a hard time getting over. And although it happened a long time ago, it is not easy to leave the past behind. Sekai is a school teacher who taught her students not only the school curriculum, and also a talented poetess known under the pseudonym "The Girl Who Can't Breathe". Her poems expressed an existential crisis and touched on topics shunned by society, and her hobbies, such as entomology, evoke mixed emotions.