Tsubasa Yazaki (矢崎翼) is main antagonist Chapter 5: Dangerous Extracurricular Activities.
Chapter 5: Dangerous Extracurricular Activities[]
Yuu Suzuki is preparing herself, along with her class-mates for the high school exams. After a test, Ichirou Endo, one of the students teases Yuu for not putting her name on her test, and she quickly does. Tsubasa Yazaki, the sensei calls for Yuu into his office and he shows her last chemistry test, which she got a failing grade. He offers her an after school study in chemistry and she accepts. During the study, Yuu accidentally spills some chemicals on her uniform and Yazaki quickly removes her clothes and offers a lab-assistant's coat.
Yazaki takes Yuu home and he tells her that he will have a chemistry session at his house the following week. At first, Yuu doesn't want to go, but her mother insists on doing it, since it would do her some good. At Yazaki's, the sensei touches her and attempts to subdue her, but she runs away. Yuu knew that he was trying to sexually assault her and she attends to report it to the principal. However, the next day at school, Yuu sees that someone wrote a sentence on the chalkboard about her being at Yazaki's house and trying to seduce him, and the other students turn against her. Yuu tries to explain the truth, but everyone refuses to listen. Even her friend, Kazu Hamasaki refuses to believe her. At the principal's office, Yazaki and Yuu's mom apologize to one another, and Yazaki informs that he was trying to be friendly, but Yuu knows the truth. Then her mom banishes her from the house and Yuu is shocked about this. A group of students taunt her for "seducing" Yazaki, but Endo sends them away, but doesn't help Yuu.
At a manga café, Yuu hears a group of girls mentioning Hell Correspondence and she decides to summon Yazaki's name. About an hour passes and Yuu is kicked out of the cafe. Yuu takes out a razor and attempts to slit her wrists, when Hell Girl appears and Yuu recognizes her from her school, as Ai Enma. Ai informs Yuu about the punishment Yazaki will endure and of the consequences, but Yuu begs her to take Yazaki to hell.
The next day, Ai asks Yazaki if he can help her with something and he takes her to the chemistry lab. However, he discovers the three assistants in the lab and they ask him about a chemical's reaction. Then, Yazaki spills some chemicals on his clothes and the assistants offer a funeral robe, informing him that his funeral will happen soon. Ai appears and Yazaki attempts to sexually subdue her, but she pulls back the curtains, revealing the students. They order him to leave Ai alone and he runs off, but Ai catches him and with the wave of her kimono sleeve, she teleports him to her ferryboat. Yazaki wakes up and demands Ai to take him back, but she ferries him to hell.
Back at the school, word had gotten out that Yazaki sexually assaulted other students in the past, and everyone apologizes to Yuu. Endo and Kazu also apologize and Yuu looks forward to her future, and features the black fire symbol on her chest.
Against Sora's Team[]
Yazaki joined Xehanort's team along with several souls, and Mitsuru Takamine that to escape by Xehanort, and villains especially He wanted revenge on his student but was intercepted especially He became an enemy of Class 3-E, and other Heroes that he is pedophile to his students so Korosensei was angry with him because Korosensei revealed that Suzuki Yuu is right way especially Korosensei see that Yuu was like Okuda, making Okuda feel that what Korosensei said was true, especially Yuu's fate was like Karma, and Nagisa Shiota that betrayed by Kensaku Ono made Nagisa, and Karma defend Suzuki from Yazaki make Class 3-E angry because Class 3-E said that Korosensei did better than Yazaki although Korosensei just like Yazaki have dark past as villains but Class 3-E that Korosensei is great teacher as second father in their school because Korosensei do it as Class 3-E teacher after Korosensei give Aguri before Aguri death make Yuu, Endo, and Yuu's classmates understood that Korosensei had more humanity than him especially Ichimokuren, Hone Onna, Yamawaro, Wanyuudou, Kikuri, Michiru, and Ai said that Korosensei is great teacher for young Hero, and Class 3-E especially he become as Ai's personal teacher because Ai was interested in Korosensei's lessons about know feeling any creature heart is innocent or evil due to Ai ever asked to Korosensei knew hell, and heaven is exist in afterlife because Korosensei answered that he is used from lessons Aguri especially he is know that Ai not bad girl because Ai is like his student especially Ai wants Korosensei to teach her more about understanding the innocent heart so Korosensei willing if Ai need advice from Korosensei, Korosensei will come to hear Ai heartfelt story make Ai happy, especially Ai's client, Yuu, Yuu friend, and Endo see that although Korosensei just like Him but Korosensei is humanity to Class 3-E as second child in school especially villains hears that Korosensei sent Yanagisawa hell before, make villains angry but instead Ai, Michiru, and Ai companions say that Korosensei is great teacher for sacrificed himself to save Class 3-E although he died before but master of Hell, and God gave chance life to Korosensei back world again to meet Class 3-E again, make Nishida, and Yoshiki Fukusawa was happy that at least Korosensei got the better than both of them but Korosensei encouraged them both make Korosensei for they make think about being more sympathetic to their students make Nishida, and Fukusawa understood that Korosensei understand the two of them as fellow teachers, especially as Yazaki work with Takaoka, and the God of Death annoys Class 3-E especially God of Death, then Shouko Baba saw the God of Death as Kuriyama's side before hearing about Korosensei's life that betrayed made Shouko understand about Korosensei making Suzuki Yuu, and Yuu student see God of Death is Korosensei traitor as Yazaki partner.