Background:

Yoshiko is a first year student who was born in the urban side of the city of Numazu. She attended the same kindergarten as her friend Hanamaru Kunikida, who she calls "Zuramaru" (ずら丸). Her mother is a teacher at a school.

Yoshiko likes the "little devil" look and proclaims herself to be "Yohane, the Fallen Angel" (堕だ天てん使しヨハネ Datenshi Yohane), an angel who has angered God and was cast away from the heavens to Earth for going way too far being like God, developing a human body which is merely a vessel to which her soul is bound to. She has developed this persona ever since she was in kindergarten, and fully embraced it during middle school. Because of this, it is implied she didn't have many friends during that time.

Yoshiko meets up with her old kindergarten friend Hanamaru, as well as Chika Takami, You Watanabe and Ruby Kurosawa in the first episode, though she acts like "Yohane" during that time until Hanamaru drives her to act normally. In the following episode, she attends class but immediately escapes after acting like "Yohane" once again. Finally on Episode 5, she is found by Hanamaru to be hiding on school, and is invited by Chika to form part of Aqours. After the group tries to adopt her "fallen angel" style, however, she leaves the group for causing them trouble with the student council president. She officially joins the group the same episode after they assure her they were okay with her "fallen angel" persona.

Personality:

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, not winning anything from lucky draws in convenience stores, falling sick right before exams, and so on. Because of this, she often blames herself for Aqours' misfortunes. Through her delusional persona, Yoshiko acts dramatic, cunning, and a little bit devious, and often goes as far as using dark, devilish accessories or clothing to further accentuate her "fallen angel" look as "Yohane". When acting like her, Yoshiko's voice is significantly lower-pitched.

Yoshiko has embraced this side of herself so much, she hates to be called by her real name and demands to be referred to as "Yohane" instead, going as far as to cross out her real name in her introduction and replace it as such as well as claiming herself to be the goddaughter of "Satan" Lucifer. As a result of embracing her "Yohane" side, it is hard for Yoshiko to act like a normal person (something she herself is aware of). This causes her difficulty to get along properly with her classmates and, at times, the rest of Aqours. She is often teased by her friends Ruby and Hanamaru for acting like "Yohane", which is annoying for her. Such moments can cause her voice to reveal her actual, high-pitched, voice.

In spite of all this, Yoshiko is a genuinely kind and decent girl, and isn't ill-willed by nature; she does treasure her friendship with the rest of Aqours for accepting her "Yohane" side; this is most evident with Ruby and Hanamaru, as shown in Season 1 Episode 13. Additionally, she affectionately refers to her friends as "little demons" (リトルデーモン Ritoru dēmon), particularly Riko Sakurauchi, whom she refers to as "Little Demon Lili/Riri. Her kindness is also shown when she rescues a dog along with Riko, and helps her friend overcoming her fear of dogs. Despite her "Yohane" side, Yoshiko is also able to pull off a normal conversation when it's really needed, most notably in Season 2 Episode 9.

Due to the fact the second-years are considered "the heart" of Aqours, Yoshiko has some difficulty relating to the third-years, which is shared with Hanamaru; this is due to her preference for the indoors and for calmer activities. Season 2 Episode 2 explores this, and after a rainy evening forces the girls to stay indoors, the first and third years are able to relate to the others (Yoshiko seemingly relating to Mari Ohara the most).

Yoshiko likes extremely spicy food, as shown in Season 1 Episode 10, where she ate takoyaki filled with Tabasco sauce. She also dislikes coffee.

Clubs and Hobbies:

Yoshiko is skilled at playing video games, her favorite genres being fighting games and racing games. She is also talented at performing magic tricks and video editing, acting as the video editor for Aqours. Her biggest hobby is dressing up like a little devil[1] and streaming herself on the internet, where she does fortune telling in spite of her curse of bad luck.

Appearance:

Yoshiko has a slim figure. She has navy blue hair that she styles into a high bun on the right side and pink eyes.