Yoshiko seems to be a chuunibyou, a person who holds delusions of grandeur. Bright, self-assured, smart, and thoughtful, Yoshiko has a persona who she describes as "Yohane", a "fallen angel" who has angered God and was cast from the heavens to Earth. Apparently, a side effect to being a "fallen angel" is that she is cursed with extremely bad luck, running into all kinds of unforeseen trouble wherever she goes: raining whenever she goes on trips, falling whenever it snows.