Summary
Irina Jelavić is a twenty-year-old professional hitman and part-time foreign language teacher standing at 170 cm tall with a weight of 50 kg. Born on October 10, she is tasked with assassinating Korosensei by infiltrating Class 3-E under the guise of an educator. Leveraging her seductive charm, she initially succeeds in manipulating Korosensei into obeying her commands, but her first attempt ends in humiliation when he neutralizes her coordinated attacks with three men. This failure fuels her desire for revenge. In the classroom, she instructs students on seduction techniques to facilitate foreign language learning, often punishing male students who fail to answer questions with a kiss. Deceitful and wily, Irina excels at infiltration and approaching targets through manipulation. She boasts a flawless record of eleven contracts across the globe and possesses fluency in ten languages. Her arrogance is palpable; she believes those in her presence should be grateful for her company and looks down on others, particularly children, whom she deems inferior to her exceptional performance. This haughty attitude makes her detestable to the Class 3-E students, leading to frequent clashes. However, after realizing the importance of cooperation and the value of the students, she abandons her condescension and learns humility. The students nickname her Bitch-nee-san after she forbids them from using her first name, which later evolves into Bitch-sensei once they acknowledge her as their teacher. This moniker derives from the end of her surname, Jelavić, where the letter "V" is pronounced as a "B" in Japanese, transforming the suffix into "-bic" or "-bitch."
