Toka Yada

Tōka Yada is a student in Korosensei's Class 3-E in Kunugigaoka Junior High School.

Appearance
Yada has dark brown hair (mid-brown in the anime) held up in a ponytail and presumably dark brown eyes (light purple in the anime). She also has the largest bust out of all the female students in Class E.

Personality
She is the big sister of Class 3-E and one of the most enthusiastic students about learning the art of infiltration from Irina. She's been described as being adult-like and cool to the point that Kayano admits that she's attracted to her despite her huge bust.

Plot
Yada debuted in Chapter 1, but didn't get the spotlight until Chapter 66. In Chapter 66, she helped the girls out of a tight spot by driving away some guys who were trying to flirt with them by pretending to be a mafia princess.

After the guys run off, she then states that the yakuza emblem she had was obviously a loaner which came from Irina. Kayano notes that she's always been the most interested student in Bitch-sensei's lessons, to which she replies that, while she doesn't want to use seduction as a means to accomplish things, she wishes to gain the necessary tools for negotiation and entertaining, as they would be the ultimate tools when going out into society, prompting the other girls to compliment her on her maturity.

Abilities
Knifework: She has the third best knifework on the girls side, along with Hinano Kurahashi.

Infiltration: As one of the more enthusiastic students in terms of Irina's lessons, Yada as gained notable skill in grifting as shown in Chapter 66, when she successfully drove away two guys by pretending to be a mafia princess.

Negotiation: Thanks to Irina's lessons, Yada has become an skilled negotiator, and she's usually the student the class relies on for the task.

Irina Jelavić
Along with Kurahashi, she's one of Irina's favorite students. They are the only the students who know about Irina's past and true personality.

Hinano Kurahashi
They are often seen together, and seem to be close friends.

Megu Kataoka
It was revealed in the official Character Book that Yada has a crush on her.

Quotes

 * (To Kaede Kayano) "It's not that I want to use seduction to accomplish things, but Korosensei mentioned it too. To carry a second blade. Skills for entertaining and negotiating... don't you thinks these would be the ultimate blades when going out into society?'

Trivia

 * Her best subject is Japanese, and her worst one is Mathematics.
 * Her future goal is to get a job in the business sector.
 * Her hobby/special skill is learning from Irina's charm lessons.
 * The thing she finds enjoyable about the letter E are the days she’s spent since entering Class E, while the thing she finds depressing about the letter E is the day where she won’t be able to fit into an E cup anymore.
 * She was called "Ponytail and Breasts" during class 3-E training using code names. The one who wrote her codename was Okajima.
 * In the "Girls you're interested in" ranking made by the boys on Chapter 19, she was ranked 2nd, with breasts listed as her best point. In the anime, the commentary next her vote tally said "Ponytail; big on top!"
 * In the art rankings of Volume 5, she was placed 5th among the female students. Korosensei comments she has rather bold ideas and choices.
 * In Chapter 82, she tells Korosensei a story about her sickly younger brother in order to persuade him to let the students escape from the cell in the cops and robbers game. The character book reveals that she does have a seriously ill younger brother, and that she fell into Class E due to skipping school to take care of him.